So funny because they joked about talks with the australian government about inclduing this on notes and now new australian $5 note that rolled out last week actually ended up with this technology
You were able to explain in 5 minutes what my Waves& Optics teacher couldn't explain in an entire semester! My teacher made interference sound difficult, but thank you Derek, for clearly explaining scientific concepts in a palatable way, and thank you for not ignoring the math!
It's called Catalyst and it's on ABC1 in Australia Thursdays at 8pm starting Feb. 7. It may be posted online if you're not in Australia. More details to come.
just take a small needle, a really small one, then take some time, and take some precission, i mean really good precission. C'mom, you're an designer. Use your imagination :)
Some powerful laser should help. If it can evaporate tiny layer of material for few impulses then you can do electromechanic guiding system to move it across the image. Or maybe better get two lasers. It will give you ability to evaporate only small interferential points.
thank you! I spent a lot of time working on it and people like @minutephysics gave me great advice, cutting things out and telling me to add diagrams, animations, etc.
I got it! I'll see if I can include something like this in the vids to come. I'm also looking at quantum computing so a discussion of measurement will be essential there too.
Very true! I actually had interviews from New York City about this, but somehow in all my travels the footage got lost. I was pretty gutted but I needed to move the story along anyway. But I'll be coming back to this point within a few weeks.
@@danielsteger8456 He was talking about the rainbow colours of cd. As far as i know those colours in cd are caused because of gratings and not holes like in the butterfly wing.
Yeah, actually they do. That's a REALLY basic piece of information, akin to: things fall when you drop them, water is wet, etc... It's super basic. Maybe not 3rd grade in some schools, but certainly by 5th grade.
Even blank ones which haven't been written still have a single very tiny spiral groove to guide the burning laser. If you burn only half of a CD, you can see where the laser has been.
This is pretty cool. A lot of the concepts you've described are what I've been studying in my mineralogy class because it deals with looking at rocks that have been sliced into sections of about 30 micrometers thick (called thin-sections appropriately enough). These thin-sections are then examined under a petrographic microscope so that the minerals in the slide can be identifed by how the light behaves when it passes through them.
You are right, and there are even rarer moments when someone accepts the compliment rather than going into an insane argument! This conversation made my day, thank you both! :D
So good to see your videos again. I've been waiting a long time for them. You are my favorite 'science' youtuber of them all (MinutePhysics, Sixty Symbols, SmarterEveryDay, etc). Hope you can post more frequently.
Another thing to think about is what if you could make those holes variable in depth or thickness and have that variability programmable on demand? That's essentially what Qualcomm did when they invented the Interferometric Modulator technology for their Mirasol display systems. By modulating the depth of the resonant cavity, they can generate a brilliant and wide gamut of colors using very little power and no other light source other than what's available ambiently. Excellent sunlight viewing.
My work as an undergraduate student is on nanotechnology, and these kinds of examples inspired me a lot to study about it all... Also, when I had Optics, these things made everything more clear to me. Cheers!
I never knew that, even seeing as cyan is one of my favorite colors. I was always under the impression that it had a wavelength between blue and green. That's my knowledge for the day, thanks.
I wonder. If you had a surface of nano-mechanical plungers, each 100nm wide and able to actuate pependicular to the surface 100nm, could you create a system for a display? THere is some precedent for this, DLP projectors have tiny mirrors on a chip that can move around. Now those mirrors are (according to wikipedia) 5.4µm, which is a way bigger, but they also needed thier pixels to pivot in two directions, if we have it acting as a solinoid, 100nm might be a viable option. Though what strikes me as the biggest difficulty would be the distances between the holes really. I'll have to give this some further thought.
Possibly it might have something to do with the fact that there's electric and magnetic parts and I think they're out of sync so constructive interference in one is destructive interference in the other which should keep energy conserved. Not 100% certain though.
SuperVelvetEars GordanCable But if you only send the frequencies that get destroyed and not the other ones, than no energy can go to constructive interference
Yeah, thats not how white light works. White light consists of all frequencies of visible light. The video doesn't mention what would happen if monochromatic light hits a film. Great question though, I wish I could give a better answer.
I've read around a bit on this and this is what I understand: Think of it like two people moving a skipping rope up and down, there will be points where the rope will be stationary (nodes) and points where the skipping rope is moving the most (anti-nodes). The nodes aren't moving, but still contain energy in the form of pressure acting on it. It's a similar thing with light, just because you can't see it doesn't mean it's not exerting a force and I think the force is magnetic, though it's very hard to get a straight answer to this on the internet!
So to remove the green wvelength to form magenta, the thickness of the soap film would have to cause the the crests of the 1st reflection to align with the troughs of the 2nd reflection (and vice versa)....causing destructive interference, the removal of the green wavelength, at that spot on the soap film. Is this correct?
It's the same as the rest of the note, just without the coloured opaque part. You can't really damage them easily, I've never tried but I'd imagine it would be hard to tear one. They're a bit like very thin laminated paper.
Have you heard about Multi-Layer-Optical film? Very similar in that they manipulate light using nano layers of two different alternating polymeric materials with different refractive indices. Those films look pretty neat!
Oooooh god, that is genius, I FINALLI got it! So when u explain how the green is removed, since u've got 250 nm between the first and the second wall, multiplied by two it gives 500 nm which is the exact distance that green light travels for a full wavelength, and so it meets the green light that is the same "state" (troth or... what was it called again xD). I got it at like... The fifth view of this video.
i just got it after you explain ._. lol thanks still i'm quite confused about how that tiny tiny hole can reflect light, at first i imagine it would be like filtering the wavelength of visible light and only allow certain wavelength to pass through, but it seems like it's not the case
@Derpy Hooves Yes, but be careful though. The graphic was greatly simplified. If the green light is shifted a full wavelength, then that actually means it should *constructively* interfere, not destructively interfere. However, it does indeed *destructively interfere* because there is a 180 degree phase shift upon reflection of the soap surface. Another confounding factor, that was also simplified, is refractive index. It actually shouldn't be 250 nm because the wavelength of green light is actually shorter in the soap film, since the light is travelling slower.
As a hifi addict, here I can see some really nice parallels between properties of light and sound. This in particular reminds me of acoustic absorbers :D Quite cool!
same site, next paragraph "A London court called the Old Bailey ruled in the 17th century that -our endings were the correct British spelling. It became commonly accepted in Britain that in cases where an English suffix or suffixes of Greek or Latin origins are attached, the u is kept. This is demonstrated in the word neighbourhood. The difference comes with Latin suffixes that don’t attach freely to words, such as in vigorous. In these cases, the u can be retained or dropped"
A similar effect, but rather than holes they use a surface that you could compare to a set of razor blades in a shaver. Since the surface is rigid and reflective, light will refract around and then sooner or later get to you eyes as the original white light but with it color pattern blended around to make it appear as a random pattern of color (the red, blue, green, etc. colors).
Actually it wouldn't hurt at all. It's a nano needle, smaller than a mosquito's bite. But it wouldn't work because this effect requires the structure to be rigid, whereas skin is soft and would simply fill the hole up as soon as the needle is removed.
Australia has many technologies exceeding that of other countries, we have great healthcare, low crime rates, better security oh and we invented wi fi which a lot of people would have used to watch this video
0:58 Finally someone explains how photons are created! In school and most videos they just say "when an electron gets excited they emit a photon." And that barely explains what's going on
Dear Veritasium. One day when I was lying on my back with a straw hat covering my face I found that if I focused my eyes correctly upon the holes in the straw I could see the surface of my eye. When I blinked I could see a line in the fluid upon my eye like a windscreen wiper and particles of dust drifting across the surface. Could you explain this? Does the small aperture cause the light reflected from the inside of my eye to come into sharp focus like a pupil creating a reverse projection.
Holy shit, this is relevant to what I'm learning - despite it not being what I'm studying. Learning about fractals in nature and mathematics. I never really understood how light was actually a fractal, and this was my "HOLY SHIT I GET IT!" moment. Thank you.
Awesome video. At 3:42, shouldn't the width of the thin film be ~1/4 of the wavelength of the light for destructive interference to occur, instead of 1/2 the wavelength of the light? (The light has to travel into the thin film and back and be 1/2 a wavelength shifted.)
Interesting! I actually have been watching a series of videos on the birds of paradise from the Cornell Lab of Ornithology and they talked a bit about iridescence and structural colors. This video was very helpful in making sense of a lot of concepts that they just skipped over. Thanks!
If its not random then it is designed! Obviously, this one example doesn't prove Intelligent Design by itself but it adds to the proof because is it so precisely designed and functional. Evolution only works because it is asserted that it works. It is a world view (just like Creation)
That is an assumption which is what I have been saying all along. But the preciseness (if that is a word) of this butterfly wing is an example of design and "work". One cannot prove with an experiment that this kind of precision "just happens". This kind of precision in our collective experience has always come about by careful planning and design and intelligence. If what you say is true then why do we see in the science literature words such as "tweak" "tinkered with" etc. If nature tinkers with the organism to make it "better able" to survive that is a goal, which implies direction or design or intelligence to know what to do to make it better.
pastor Larry There is a difference between presuming and assuming. Evolution is surely based on a few presumptions, but intelligent design is based on assumption. What makes you think that this is precision?
One of the meanings of presumption is assumption. Evolution is based on the assumption or presumption that it is true, that is there is no Creator for what we see. Intelligent Design is based on the assumption or presumption of an Intelligent Creator for what see. What makes me think that this butterfly wing is precise it the exacting measurement and design that gives the effect of colour. Non-intelligence (or evolution) or random genetics or happenstance will not result in such precision.
wow I saw this information a few months ago when for some reason it became trending and no one explained it like you, I really love your job Dereck 42.0
Dang it, Derek, I needed this video last week when I was teaching thin film interference in my AP Physics 2 class. They would have loved to seen it then....
The emphasis is on the light reflecting off the wing. When they place the light source behind the butterfly wing, the blue colour isn't there. That means you can't see the "structural colour" when the light enters the wing from the back. If the wing would be coloured through pigments instead of structures, it would still look blue if the light shone through it from the back.
Well sir, you are. The brown at 2:10 is the back side of the wings, which is what you see when holding it up to the light and looking at the "blue side" because that is the the color shining through rather than reflecting off the front. Similar to how in the daytime the outside reflects off a very reflective window, yet at night the lights from inside allow someone from the outside to see through the window. I have my own butterfly. No illusions here. Just physics.
I just wanted to tell you, that I really enjoy your videos. Your personality is very attractive, and your accent is marvelous. However, the best reason that I enjoy your videos is that you cover your topics very well. You explain why, and how the physics of science works, but on a level that doesn't necessarily need a college degree to understand what is happening. Thank you for being a great teacher. I'm from Montgomery, AL. in America, I started watching RUclips about 5 years ago, after obtaining my first laptop. After learning how to navigate around on the internet, I found RUclips. Your channel was the very first one I discovered, and I liked. I subscribe to it immediately. I enjoy science and learning about how the universe works because of the laws of physics. Please keep them coming. Take care, John Trusty.
That's deliberate. It's made that way so you can't crease it and it lasts longer. Also if you take a brand new note and fold it, it is considered unfit for circulation and banks are supposed to send notes with creases in them to be destroyed.
In Romania we have plastic money too.They were introduced at least 10 years ago from what I remember,and like those from Australia,have that sort of transparent window.
Very nice basic explanation and demonstration of interference in thin films although technically the phase changes on the front surface and non-phase change of the back surface were not always accurately portrayed throughout the clip. Excellent job though.
Actually this effect has practical application in projectors with DLP matrix. That is why, when you move your eyes when looking at reflex of light from projectors lamp you see rainbow effect. It's because in reality white color is not diplayed at any time - it consists of red, blue and green that are displayed alternately. When you move your eye different colours are displayed at different places on your retina, and thats why you see three different colours than.
Derek I cannot thank you enough for mentioning that soap film... and why the colours appear! That very question came in my final year physics paper :'D I was smiling like a lunatic in the exam hall reading that question.. Thanks again! ^^
Romania has had polymer banknotes since 1999, when the 2000 lei note, the first European polymer banknote, was issued to commemorate the August 11 1999 solar eclipse. Check out "2000 lei note", it's a very colorful design. I haven't seen one of them for many years now.
Yes, they seem to have been taken with a SEM or possibly a STEM. The wavelength of an electron is much smaller than that of a photon with equivalent energy, around 500x smaller, in fact. Also, cameras don't need visible light. Though it would be extremely impractical, it would be possible to image things this small using extremely high-energy (low-wavelength) light, such as gamma rays. X-rays may even be sufficient for a blurry image.
If I'm not mistaken, this is the same phenomenon that plays in human eye color. The human iris is only pigmented to be brown and yellow, yet our eyes are often blue and green.
WOW good stuff. Transmitters and basically electron wigglers and green light has a wavelength of about 500 nm, and the little holes are destructive to certain wavelengths of light.
"without that light reflecting off of it, you don't get any blue..", honestly, that goes for everything! the grass wouldn't be seen as green, if it wasn't because green light is reflected off of it.
![BLACK BAG - Official Trailer [HD] - Only in Theaters March 14](http://i.ytimg.com/vi/Du0Xp8WX_7I/mqdefault.jpg)
So funny because they joked about talks with the australian government about inclduing this on notes and now new australian $5 note that rolled out last week actually ended up with this technology
3 years of negotiating this include
@@GregBowler Store the excess laugh so that you can laugh whenever you want.
Aren't these just generally called holograms? I've seen things like this decades ago.
@@Competitive_Antagonist No, this are more like hollowgrams. ROLF!
Wow! I laughed at my own comment 8 months later
"I cannot comment on that" = "Yes, absolutely. That's 100% correct"
Man I don't know who or where you are but look it up on Google, that was a definite yes
It was a no if you happen to look it up on bing.
You were able to explain in 5 minutes what my Waves& Optics teacher couldn't explain in an entire semester! My teacher made interference sound difficult, but thank you Derek, for clearly explaining scientific concepts in a palatable way, and thank you for not ignoring the math!
One of the coolest videos I've seen in a while, especially the visualization of how soap bubbles cancel out certain wavelengths of light.
It's called Catalyst and it's on ABC1 in Australia Thursdays at 8pm starting Feb. 7. It may be posted online if you're not in Australia. More details to come.
So if I cut my hair _really precisely,_ I could save on hair dye? Sweet!
William Shreckengost
Well if the wind came it could change colours or just become normal again, neat!
You would need a laser
@@overloader7900 A shovel would so work as well. Not.
@@someonesomewhere8869 pepe the frog officially died in 2016
@@overloader7900 pneumonia sucks. Wash your hands.
do you intentionally have those wings in the back ground to make you look like a fairy princess ?
1:30 Fairy Princess! 😍
Lol
"I cannot comment on that."
I think he looks good! For this tiny part of what makes up his life, let him have his moment
@@just-the-slooperman-trampi3250 He does look good
Probably the only video where Derek is clean-shaved
There's also the Experiments A Capella xD
What?
Kartik Kapila you called?
There is one more
@@Willam_J why
1:30. First male Victoria's Secret model
you won the internet, sir
Lol omgggg😂
+
Ruben FZ he
XD
Wow, as a graphic designer I really want a printer that could do this
just take a small needle, a really small one, then take some time, and take some precission, i mean really good precission. C'mom, you're an designer. Use your imagination :)
Some powerful laser should help. If it can evaporate tiny layer of material for few impulses then you can do electromechanic guiding system to move it across the image. Or maybe better get two lasers. It will give you ability to evaporate only small interferential points.
Whoa
You can just use interference blue pearlescent pigments with clear ink, but not with a inkjet!
@@ЮрийДолотказин-с4ы i think it is impossible to focus the light to be that small
thank you! I spent a lot of time working on it and people like @minutephysics gave me great advice, cutting things out and telling me to add diagrams, animations, etc.
Great vid. also great to meet you the other day!
Subscribed :)
What if I replied to this comment
🗿 ok
Oh sh...
How long has it been since you guys had a chat? Also were you verified when you guys had a talk?
I got it! I'll see if I can include something like this in the vids to come. I'm also looking at quantum computing so a discussion of measurement will be essential there too.
How are you doing
I wish you were my science teacher
Very true! I actually had interviews from New York City about this, but somehow in all my travels the footage got lost. I was pretty gutted but I needed to move the story along anyway. But I'll be coming back to this point within a few weeks.
oh yeah thats why a cd looks like that
Oh yeah i never thought about that.
A CD actually looks like that because of gratings and not holes.
@@SC-zq6cu he was talking about the butterfly wing technology not the hole one
@@danielsteger8456
He was talking about the rainbow colours of cd. As far as i know those colours in cd are caused because of gratings and not holes like in the butterfly wing.
@@SC-zq6cu it said in the video that butterfly wings get their colour by trapping light in their gratings in their wings. they are not holes.
"Most people know that it's a form of electromagnetic radiation..." Psh yeah of course I knew that. Duh.
+MrWolfy43 By most people, that means anybody who paid attention in 3rd grade science class.
+Jason Rogers no one teaches that light is a form of electromagnetic radiation in 3rd grade.
Yeah, actually they do. That's a REALLY basic piece of information, akin to: things fall when you drop them, water is wet, etc... It's super basic. Maybe not 3rd grade in some schools, but certainly by 5th grade.
Yes, technically no. But in the everyday vernacular, water is related to the concept of "wet". So in this context my statement was accurate.
Well that's because you're of at least average intelligence.
Coolest part of this vid imo: seeing the cool clear part of the austrailian bill. I had no idea they were like that.
Excuse me, it's called a note.
0:13 "most people know that [light] is a form of electromagnetic radiation..."
uh, no. *most* people do not know that.
@@coyotedomino why? Is your reasoning that science is common knowledge?
The only thing that could make this channel more like VSauce is if the guy popped up into the frame at the beginning of every paragraph.
HEEEY! VSAUCE! Michael here!
I guess this is why the back of a cd looks all rainbowish sometimes.
+GameZap! cds have tiny little holes in it created by a laser burn. that´s how we put data into cds. and that's why it is rainbowish
Thank you so much, you really amazed me xD
FckThtShit11 Yeah, I know. That's why I said what I said?
It does not apply to rewriteable discs.
There it is different molecular state of a material. hmm. I might be mistaken that they are also colorful.
Even blank ones which haven't been written still have a single very tiny spiral groove to guide the burning laser. If you burn only half of a CD, you can see where the laser has been.
This is pretty cool. A lot of the concepts you've described are what I've been studying in my mineralogy class because it deals with looking at rocks that have been sliced into sections of about 30 micrometers thick (called thin-sections appropriately enough). These thin-sections are then examined under a petrographic microscope so that the minerals in the slide can be identifed by how the light behaves when it passes through them.
See Richard Feynman's lecture series on QED here on youtube to understand the physics behind this. He explains it in the first of the four lectures.
You are right, and there are even rarer moments when someone accepts the compliment rather than going into an insane argument! This conversation made my day, thank you both! :D
THIS IS THE GREATEST VIDEO I'VE SEEN IN YEARS
The way you explain things is the best ever... I have seen.. I appreciate your efforts for making such videos :)
Derek is looking awesome after clean shave.
Adib Ferdous Totally
So good to see your videos again. I've been waiting a long time for them. You are my favorite 'science' youtuber of them all (MinutePhysics, Sixty Symbols, SmarterEveryDay, etc). Hope you can post more frequently.
here in Brasil, the Reais (the money we use here) can change the colors from blue to green, depending on the point of view.
+Felipe Lorenzzon how does it work?
+Felipe Lorenzzon lol
+Felipe Lorenzzon the holes are in on an angle so they get bigger and smaller depending on point of view
Another thing to think about is what if you could make those holes variable in depth or thickness and have that variability programmable on demand? That's essentially what Qualcomm did when they invented the Interferometric Modulator technology for their Mirasol display systems. By modulating the depth of the resonant cavity, they can generate a brilliant and wide gamut of colors using very little power and no other light source other than what's available ambiently. Excellent sunlight viewing.
"I cant comment on that"..........that just screams yes I have been in contact with the Australian government
This is one of the best explanations of Diffraction I've ever seen
“I cannot comment on that” is the another form of yes 😃
My work as an undergraduate student is on nanotechnology, and these kinds of examples inspired me a lot to study about it all... Also, when I had Optics, these things made everything more clear to me. Cheers!
0:13, well according to all your street videos, I'm highly skeptical about this claim
I never knew that, even seeing as cyan is one of my favorite colors. I was always under the impression that it had a wavelength between blue and green. That's my knowledge for the day, thanks.
I wonder. If you had a surface of nano-mechanical plungers, each 100nm wide and able to actuate pependicular to the surface 100nm, could you create a system for a display? THere is some precedent for this, DLP projectors have tiny mirrors on a chip that can move around. Now those mirrors are (according to wikipedia) 5.4µm, which is a way bigger, but they also needed thier pixels to pivot in two directions, if we have it acting as a solinoid, 100nm might be a viable option. Though what strikes me as the biggest difficulty would be the distances between the holes really. I'll have to give this some further thought.
this is so interesting, i love it!! i can watch these videos all day long, i'm so hooked into this it's crazy:)
but where does the energy go from the light that gets destroyed, by interfering with itself?
Great question! I think it goes into corresponding bands of constructive interference in higher and lower frequencies, but I'm really not sure.
Possibly it might have something to do with the fact that there's electric and magnetic parts and I think they're out of sync so constructive interference in one is destructive interference in the other which should keep energy conserved. Not 100% certain though.
SuperVelvetEars GordanCable But if you only send the frequencies that get destroyed and not the other ones, than no energy can go to constructive interference
Yeah, thats not how white light works. White light consists of all frequencies of visible light. The video doesn't mention what would happen if monochromatic light hits a film. Great question though, I wish I could give a better answer.
I've read around a bit on this and this is what I understand:
Think of it like two people moving a skipping rope up and down, there will be points where the rope will be stationary (nodes) and points where the skipping rope is moving the most (anti-nodes). The nodes aren't moving, but still contain energy in the form of pressure acting on it. It's a similar thing with light, just because you can't see it doesn't mean it's not exerting a force and I think the force is magnetic, though it's very hard to get a straight answer to this on the internet!
I enjoyed learning how light can create color just by adjusting the amount of wave lengths that pass through an object. Thank you Veritasium :D!
If you had moved to the US instead of Canada, would this have said "color" or "colour" in the title?
That my find sir is a great observation of the butterfly effect. Wich has nothing to do this video but its cool
The entire english speaking world except the US spells it as "colour"
Wait so in the U.S they call it color?
Nobody asked. :D USA is a hipster.
no u
In the USA, it is indeed “color.”
Well done, you put two and two together. You have restored my faith in humanity.
the thumbnail looks as if he was some strange kind of fairy
Thanks for the video. I now understand a little bit more about light.
You looked great with those blue morpho wings behind you, by the way.
So to remove the green wvelength to form magenta, the thickness of the soap film would have to cause the the crests of the 1st reflection to align with the troughs of the 2nd reflection (and vice versa)....causing destructive interference, the removal of the green wavelength, at that spot on the soap film. Is this correct?
Yes it is.
gracias
Nice video dr.derek... You're such a great person and I respect you a lot :) thank you
What if you accidentally punch out that film on your bank notes?
It's the same as the rest of the note, just without the coloured opaque part.
You can't really damage them easily, I've never tried but I'd imagine it would be hard to tear one. They're a bit like very thin laminated paper.
Have you heard about Multi-Layer-Optical film? Very similar in that they manipulate light using nano layers of two different alternating polymeric materials with different refractive indices. Those films look pretty neat!
Your a pretty fairy
+Stephanie Giersz augh... I hate to be an annoying grammar police but please, use correct grammar. *you're
+Donald Trump 😂
*you're
One of the best episodes ever. (As good as "the roundest object" episode. And many other, as well.)
Oooooh god, that is genius, I FINALLI got it! So when u explain how the green is removed, since u've got 250 nm between the first and the second wall, multiplied by two it gives 500 nm which is the exact distance that green light travels for a full wavelength, and so it meets the green light that is the same "state" (troth or... what was it called again xD). I got it at like... The fifth view of this video.
i just got it after you explain ._.
lol thanks
still i'm quite confused about how that tiny tiny hole can reflect light,
at first i imagine it would be like filtering the wavelength of visible light and only allow certain wavelength to pass through, but it seems like it's not the case
@Derpy Hooves
Yes, but be careful though. The graphic was greatly simplified. If the green light is shifted a full wavelength, then that actually means it should *constructively* interfere, not destructively interfere. However, it does indeed *destructively interfere* because there is a 180 degree phase shift upon reflection of the soap surface. Another confounding factor, that was also simplified, is refractive index. It actually shouldn't be 250 nm because the wavelength of green light is actually shorter in the soap film, since the light is travelling slower.
As a hifi addict, here I can see some really nice parallels between properties of light and sound. This in particular reminds me of acoustic absorbers :D Quite cool!
Why do they named it Blue morpho butterfly if it has a color of gold and white?
same site, next paragraph "A London court called the Old Bailey ruled in the 17th century that -our endings were the correct British spelling. It became commonly accepted in Britain that in cases where an English suffix or suffixes of Greek or Latin origins are attached, the u is kept. This is demonstrated in the word neighbourhood. The difference comes with Latin suffixes that don’t attach freely to words, such as in vigorous. In these cases, the u can be retained or dropped"
Is the same process used to create that shiny 3d mark on a credit card?
A similar effect, but rather than holes they use a surface that you could compare to a set of razor blades in a shaver. Since the surface is rigid and reflective, light will refract around and then sooner or later get to you eyes as the original white light but with it color pattern blended around to make it appear as a random pattern of color (the red, blue, green, etc. colors).
I love nature.
This is why science excites me! It's just awesome!
I wonder if you could do this to your skin? RAINBOW SKIN!
would probbably hurt alot to get those holes punched in you and would probbably heal soon..
Skin is already really rough and not smooth at all. Glass can be really flat so the holes wont mess up
Your skin already has holes where do you think sweat comes from?
Actually it wouldn't hurt at all. It's a nano needle, smaller than a mosquito's bite. But it wouldn't work because this effect requires the structure to be rigid, whereas skin is soft and would simply fill the hole up as soon as the needle is removed.
@Aniket I reckon you'd only be able to see a spot of color, since our skin isn't flat.
Incredibly cool! Imagine using this for fashion fabrics and textiles!!
Australia has many technologies exceeding that of other countries, we have great healthcare, low crime rates, better security oh and we invented wi fi which a lot of people would have used to watch this video
And a killer minimum wage!
YAY AUSTRALIA!!! And lots of other countries but mostly AUSTRALIA!!!
and the blackbox flight recorder.
you may have seen cyan, which is actually a mixture of red and blue that looks like a light green.
2:33 lmao he has wings :p
Gotta love those PhET physics simulations from U. Colorado!
0:58 Finally someone explains how photons are created! In school and most videos they just say "when an electron gets excited they emit a photon." And that barely explains what's going on
Dear Veritasium. One day when I was lying on my back with a straw hat covering my face I found that if I focused my eyes correctly upon the holes in the straw I could see the surface of my eye. When I blinked I could see a line in the fluid upon my eye like a windscreen wiper and particles of dust drifting across the surface. Could you explain this? Does the small aperture cause the light reflected from the inside of my eye to come into sharp focus like a pupil creating a reverse projection.
Holy shit, this is relevant to what I'm learning - despite it not being what I'm studying. Learning about fractals in nature and mathematics. I never really understood how light was actually a fractal, and this was my "HOLY SHIT I GET IT!" moment. Thank you.
I wish the US would do something like this. However we (US people) seem to be stuck in the past.
We do this now, actually.
Awesome video. At 3:42, shouldn't the width of the thin film be ~1/4 of the wavelength of the light for destructive interference to occur, instead of 1/2 the wavelength of the light? (The light has to travel into the thin film and back and be 1/2 a wavelength shifted.)
Sad that we see fiat currency as so valuable.
Maytons exactly, the central banks prints more fake money than any counter fitter, so whats the point?
Interesting! I actually have been watching a series of videos on the birds of paradise from the Cornell Lab of Ornithology and they talked a bit about iridescence and structural colors. This video was very helpful in making sense of a lot of concepts that they just skipped over. Thanks!
The butterfly proves Intelligent Design. No amount of random anything will result in such a wonderful structure.
If its not random then it is designed! Obviously, this one example doesn't prove Intelligent Design by itself but it adds to the proof because is it so precisely designed and functional. Evolution only works because it is asserted that it works. It is a world view (just like Creation)
pastor Larry Evolution does not *work*, it just happens. *Working* implies that there is a goal and does not apply to natural phenomena.
That is an assumption which is what I have been saying all along.
But the preciseness (if that is a word) of this butterfly wing is an example of design and "work". One cannot prove with an experiment that this kind of precision "just happens". This kind of precision in our collective experience has always come about by careful planning and design and intelligence.
If what you say is true then why do we see in the science literature words such as "tweak" "tinkered with" etc. If nature tinkers with the organism to make it "better able" to survive that is a goal, which implies direction or design or intelligence to know what to do to make it better.
pastor Larry There is a difference between presuming and assuming. Evolution is surely based on a few presumptions, but intelligent design is based on assumption. What makes you think that this is precision?
One of the meanings of presumption is assumption. Evolution is based on the assumption or presumption that it is true, that is there is no Creator for what we see. Intelligent Design is based on the assumption or presumption of an Intelligent Creator for what see.
What makes me think that this butterfly wing is precise it the exacting measurement and design that gives the effect of colour. Non-intelligence (or evolution) or random genetics or happenstance will not result in such precision.
wow I saw this information a few months ago when for some reason it became trending and no one explained it like you, I really love your job Dereck 42.0
Dang it, Derek, I needed this video last week when I was teaching thin film interference in my AP Physics 2 class. They would have loved to seen it then....
Ur channel is mind boggling!! Simply fantaboulous!!!
The emphasis is on the light reflecting off the wing. When they place the light source behind the butterfly wing, the blue colour isn't there. That means you can't see the "structural colour" when the light enters the wing from the back. If the wing would be coloured through pigments instead of structures, it would still look blue if the light shone through it from the back.
Who wouldn't subscribe to your channel?! You are blessed.
0:50 Phet! I use that when I teach my GCSE class about radio waves.
10/10 legendary, two months is a very long time to keep this up
Well sir, you are. The brown at 2:10 is the back side of the wings, which is what you see when holding it up to the light and looking at the "blue side" because that is the the color shining through rather than reflecting off the front. Similar to how in the daytime the outside reflects off a very reflective window, yet at night the lights from inside allow someone from the outside to see through the window. I have my own butterfly. No illusions here. Just physics.
I just wanted to tell you, that I really enjoy your videos. Your personality is very attractive, and your accent is marvelous. However, the best reason that I enjoy your videos is that you cover your topics very well. You explain why, and how the physics of science works, but on a level that doesn't necessarily need a college degree to understand what is happening.
Thank you for being a great teacher. I'm from Montgomery, AL. in America, I started watching RUclips about 5 years ago, after obtaining my first laptop. After learning how to navigate around on the internet, I found RUclips. Your channel was the very first one I discovered, and I liked. I subscribe to it immediately. I enjoy science and learning about how the universe works because of the laws of physics. Please keep them coming. Take care, John Trusty.
And thus, a powerful friendship was forged and the two lived happily ever after.
These are great explanations!
Mind=Blown. Just like on most of your other videos.
These videos are so amazing.. Thanks!!!
That's deliberate. It's made that way so you can't crease it and it lasts longer. Also if you take a brand new note and fold it, it is considered unfit for circulation and banks are supposed to send notes with creases in them to be destroyed.
Effective Medium Theory is used in Nanotechlogy for calculation of such nanostructure parameters.
In Romania we have plastic money too.They were introduced at least 10 years ago from what I remember,and like those from Australia,have that sort of transparent window.
Very nice basic explanation and demonstration of interference in thin films although technically the phase changes on the front surface and non-phase change of the back surface were not always accurately portrayed throughout the clip. Excellent job though.
Actually this effect has practical application in projectors with DLP matrix. That is why, when you move your eyes when looking at reflex of light from projectors lamp you see rainbow effect. It's because in reality white color is not diplayed at any time - it consists of red, blue and green that are displayed alternately. When you move your eye different colours are displayed at different places on your retina, and thats why you see three different colours than.
Derek I cannot thank you enough for mentioning that soap film... and why the colours appear!
That very question came in my final year physics paper :'D
I was smiling like a lunatic in the exam hall reading that question..
Thanks again! ^^
I just want to say great choice of music, I love Endless Space.
Romania has had polymer banknotes since 1999, when the 2000 lei note, the first European polymer banknote, was issued to commemorate the August 11 1999 solar eclipse.
Check out "2000 lei note", it's a very colorful design. I haven't seen one of them for many years now.
Yes, they seem to have been taken with a SEM or possibly a STEM.
The wavelength of an electron is much smaller than that of a photon with equivalent energy, around 500x smaller, in fact.
Also, cameras don't need visible light. Though it would be extremely impractical, it would be possible to image things this small using extremely high-energy (low-wavelength) light, such as gamma rays. X-rays may even be sufficient for a blurry image.
This right here is a deep level of intellectual ingenuity
If I'm not mistaken, this is the same phenomenon that plays in human eye color. The human iris is only pigmented to be brown and yellow, yet our eyes are often blue and green.
Plus it looks so cool, i reckon we have the most colorful and vibrant notes
4:00 blue and red have the same phase velocity in air/vacuum
Bro you should totally be a teacher.......like seriously I learn more from watching you than going to school......great job, keep it up
I have a framed Morpho almost exactly like the one in the video. It's beautiful.
WOW good stuff. Transmitters and basically electron wigglers and green light has a wavelength of about 500 nm, and the little holes are destructive to certain wavelengths of light.
"without that light reflecting off of it, you don't get any blue..", honestly, that goes for everything! the grass wouldn't be seen as green, if it wasn't because green light is reflected off of it.