Lasers measured with CD measured with lasers!?!
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- Опубликовано: 27 май 2024
- Can a CD be used as a diffraction grating for lasers to measure the track spacing on the CD and the wavelength of lasers? Time to find out...
Video with diffraction grating: • MISLABELED LASER | Pow...
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These videos are definitly awesome.
I once didnt remember your name so i just searched magnet dude.
bruh
There aren't many channels that I make a point of watching every video. Yours is one I get excited when I see a new video get published. I love your enthusiasm. And thank you for the in depth, high quality content.
So therapeutic and so informative. I especially love how you reward the viewers who watch it all the way to the end of your video. Fascinating, as well as mind-cleansingly soothing!
Love your videos and your voice, especially! : D
This is my new favorite science channel; soothing voice, cool, practical experiments, interesting results, you've got it all. Keep it up!
An upload from this channel is all I needed this weekend. Amazing as usual!
Love lazers and magnet if you were a teacher, students will be wide awake for your class
Either that, blind, missing some limbs, or any combo of the above
That gift was awesome looking! Good job, Spencer! 👍
Loved the bit at the end. You're very thorough and to-the-point with your explanations, it's always refreshing when youtubers refrain from "skipping the math part" :D
6:28 Agghhh! My hexakosioihexekontahexaphobia! No, I've never heard of that either, so I've learned more than I expected to from this video.
I like the more frequent uploads! Even though I'm a couple days back in my "Subscriptions schedule", I appreciate the high quality content you produce!
You’re probably the purest RUclipsr I’ve ever subscribed to.
I love your channel. More quality videos = more happiness to me.
That logo gift looks superb. I wish I had one like it.
666.666, repeating of course.
well thats a lot better than we usually do
666 the devil's number
@@Hi-ix5bb The original text says 616 and it probably is some code refereeing to Nero. It makes sense in context too lol.
You are an asset in the field of scientific communication to the public eye. You share your knowledge with excitement and joy, whilst remaining humble and modest about your achievements/innovative ideas. For this, I thank you
Nice calculations. Congrats on that awesome sign!
I'm glad to know your next video, brainiac. Keep it up
Sir thanks for responding to our comments and making this video!
I think it's about time that you made a tutorial video on how lasers work and how they have improved over time and modernized the study of physics(of course you can use some your own lasers to demonstrate also :)
Wow that plexiglass logo is sick
Brainiac 75. That's a good title for your videos.
Jeez you sure are bright. Deep but very interesting- thank you.
That was very interesting! Please never stop making videos
I love your videos so much it makes me sad they're so far apart but I understand your work and probably a lot of editing. Keep it up though please.
I love his videos as well. There just so, cool and satisfying.
These complex mathematical algorithms are a bit daunting at first, but, when you know what to do, they're quite helpful. My philosophy is that the difference between an easy question and a difficult one is whether or not you know the answer. :)
Kudos to your channel. May it live another 10 years!
This has to be the comfiest channel on this website. Thanks for your work.
Glad you like it! New video coming very soon :D
Excellent video, very informative and well presented. I love the great user comment which greatly simplified your calculations. Almost made me miss my math studies (been out of uni for 20 years now).
Is good to see you back :)
This channel is so relaxing
Cheers from Brazil! Love your videos, they are very entertaining and relaxing to watch. It is pure relaxing science!
Love your videos and subject matter. Thank you so much!
Awesome video, and better yet cheers for the feedback of those formulas, and the LED stand. Those fans are awesome
Thank you for making this video, I learned something today again!
Hope You Love The Sign. I love watching your videos. They teach me new things and I just enjoy them!
Your guess about the track spacing is exactly correct. As manufacturing got more precise, cramming in a little more data was easy. In fact, there was a proposal to do it even closer together... But DVD was out by then.
Oh man, hearing Kevin Macleod's 'Dream Culture' play in your video was great, lol.
The last equation, @ 10:45 , where you say you need to use a memory function, you actually don't. The value that you put in memory, you can instead do 1/x, and then multiply with your d_nm. So I think both are quite beautiful.
Thank you for a very good channel and videos!
Looking forward to the monster magnets in action! Thank you for teaching what you know it is greatly appreciated!
That... ...was awesome. !!! :D TY kindly for sharing your work with us. :)
I actually really like your scientific approach on this one
Hey again! Super awesome video
Woah man! You got something against that CD-guy? Right throug the crown-jewels.... ;)
I love this channel....it's melodic to an engineer such as myself.
i am so glad i found your channel!!
I know it's a good day when I see you've uploaded a video. :)
It's great seeing some math in your videos! I love watching all the information gather into a useful measurement!!!!
Great video. It was nicely edited too. Thumbs up and subbed!
Thank you very much - and a late welcome aboard :) (somehow your comment ended in the spam folder - no idea why...)
No worries! That happens to me all the time too.
A new video, finally! :) I love science, but I love your voice more.
It's interesting seeing the things I'm studying in college applied in the real world. Good video!
I love this channel. All I wish to do but can not can be viewed here. Thank you.
Loved your teaching
Great video again. Love the science.😀
Fascinating video dude. The maths is way above my pay grade though. Keep it up :)
i really love your videos cant wait for the next one
Before i had to leave college, Math was my biggest passion. Finding your videos on chemistry (As with the magnets and elements) and this laser one.. It's like discovering and old toy or watching a movie you forgot you loved.
+1 from me.
Sounds like we have the same interests so you have come to the right place - much more to come. Welcome aboard :)
I love the silver long laser pointer you have
I liked the laser videos, though I am really excited to see more magnet videos, they are some of my favourite. I love your channel, makes me want to come and do science with you.
Yay!! The magnet videos are back!!
awesome video!! great explanation of everything. i liked! :)
Even if I don't like maths and formulas, I will always reach the end of your videos ;)
Hi braniac you are the person who got me addicted to Neodymium magnets and lazers and I wish one day you will begin to upload more often, but great content. Also I was wondering when you would join your two 6 by 2 inch magnets (if you weren't joking about it in the video where you unboxed the second one because I'm really looking forward to seeing that happen
tuatara _77 same
Mag Venture I can tell you like Neodymium magnets because of your logo for your channel
;]
I'm trying to reach a monthly upload this year (now on a part time dayjob as mentioned in an earlier video). I am going to attempt to pair up the two 6x2"s in the future. Not sure when though... Thanks for watching!
Brainiac75 You Will Most Likely Damage Them Both, And Maybe Your Whole Arm, Your Choice But It Seems So Dangerous...
I liked the way you wrote: 666 2/3. It's a prettier way than decimals one lol
Hehe, and more precise. Thanks for watching and commenting again ;)
Love this channel
Great video as always! I do not have the phobia mentioned in this video, and I cannot wait for the new magnet video! Let's hope you do not hurt.
Thanks! No worries, I will not have the 5 large magnets in the room at the same time and no heavy weight lifting :)
Well done as always, Brian. Always a pleasure to see a RUclips email telling me you've uploaded a video.
I know you've got your next video or two planned out, but may I request some electrical content soon? I'm into my second semester currently of electronics and electrical engineering and I'm learning about all sorts of fascinating things I've always been interested in. It would be nice to see a Brainiac video that I could put some of my newfound knowledge to the test in.
Thanks for having the notification bell on :) I am considering some high voltage stuff in the future - like tesla coils and such. I doubt I will make videos about electronics. I can recommend channels like bigclivedotcom and EEVblog for that.
Comprehensive and elegant
Yet again you never fail to disappoint. Can't wait for your next video, Brian. It's going to be "attractive" ;)
Fantastic video!
GREAT ... ANOTHER COOL VIDEO ....! I LIKE THAT ....!
I hate maths but I love your videos !
Woo my comment is in the first few frames! Thanks and thanks for the video :)
Damn, så var der en igen, lige som jeg skulle have Brainiac75 abstinenser :) Takker og bukker ærbødigt
fascinating, as always
I am officially worried about the next video and the fact that it is possible to use a CD to calculate a wavelength of a laser was quite fascinating and also seeing the fact that you had to extend your ruler was quite funny , thank you so much for your hard work for making this video's I appreciate it greatly and I can't wait for the next video , keep up the amazing work that you are doing
PS : sorry for any mistakes and greetings and salutations from Iran
PPS : you can literally pick up girls with the Monster Magnet that you have
Thanks Abteen! I will not have the 5 largest magnet in the room at the same time ;) Instead of extending the ruler I could have moved the diffraction grating closer to the wall, but for consistency I chose to just extend the ruler x) Also turned out to be a nice way of illustrating indirectly how long the wavelength of the ancient laser pointer is. Greetings back from Denmark as always!
Great video and presentation. I employed the same technic, but with a different formula to mesure the wavelength of my red cheap laser, and I found it was around 750 nm, I think it's correct because my laser is red, but not very precise as I don't have a diffraction grating and a good laser to check the CD, but it was a 700Mb one. My formula is this for 2 fents :
i(distance between 2 spot of light) = λ(wavelength)*d(distance CD-wall)/a(distance between 2 fents : 1,5µm)
λ = i(6 cm in my case)*a(1,5*10^(-6))/d(12cm in my case)
λ = 0.06*1.5/(0.12*10^6)
λ = 750*10^(-9) = 750nm which is red.
But at 3:42, you wrote θ1= arctan(S1/2L), isn't it rather θ1 = artcan(S1/L). I know that with what you wrote, your results are right, but I have never used arctan like that. Even by defining the hypotenuse with the theorem of Pythagore, then using arcsin or arccos, I don't have the same formula as you.
Very interesting!
Cool! Nice lamp.
Hey Braniac! I love your video's! It's amazing how much I learned about magnets and radioactivity with your videos! But, that intro, how do you make that? Thanks for making vids!
Thanks :D The logo intro? It's basically individual pictures of the warning signs I animate in the video editor. The waving black background is just a looped stock video.
And you move that with the editing program?
Yes, the warning signs are 'animated' inside HitFilm Pro. Actually, I just keyframe their size and position even though HitFilm can do 3D too.
Thats cool, wanted to do this since your 1st video, but didn't want to buy a diffraction grate. Just tested this out my 532nm laser ended being 528nm using this method to measure. Close enough for me!
Nice idea of using a normal cd for testing lazers.
Mind blowing!!
Be careful with the Magnet looking forward to your next video!
Really interesting vids keep it up
Ahh, quantitative experiments... Thats some good stuff.
The more you know o.o
great video!
Awesome. Working with light in Physics now.
Hey! Love your videos. :)
Same ;]
Thanks :D More to come.
Nice one liked it.
actually it is possible to measure the laser wavelength using the ruler seen at 2 min, the mm lines can be used as a grating (with grating constant 1mm), use a small incidence angle.
thank you for your videos!
sir,can i get to
know more about equations and measurement basis have you used ?
nice vid keep up the good work :)
word
cool. going to try this with my various lasers and CD, DVD, blueray, HDCD, magneto-optic, sega disk (which has different track spacing), laserdisk, video disk, various LP albums... many of which will not be blanks though and some that will have to be reflection setup.
Could you try shining white light on the diffraction graters? Would be cool to see the light split in it's different wavelengths
I liked how he cut the dvd surface with a screw ripping the Man's zip😂
great video
Going to try this to measure my "492nm" laser from Sanwu. I think you should test your 505nm too! Turns out the wavelength of many diode lasers very alot, (e.g. someone got 480nm from a 488nm diode, or 509nm from a 505nm diode) so it would be pretty interesting to see.
P.s. as I finished typing I just remembered that you have a proper spectrometer.
If you like lasers you should try to get your hands on a 589nm yellow. While far from cheap the golden yellow beam it produces is second only to my multiline argon as my favorite laser in my collection. The amber color from my 594.1nm HeNe is pretty sweet too.
Just googled some photos. Beautiful!
Nice video
Hello,
It is very informative. I am wondering could we find a way to measure a film thickness using a laser?
Thanks
10:47 You can avoid using the memory functions on the calculator in that situation by hitting the reciprocal button (1/x) after calculating the denominator, then multiplying by the numerator, btw.
Very cool.
You don't need memory functions for those formulas! The standard calculator has a "1/x" button that gives you the inverse, which you can multiply straight away by the numerator to get the result.