I first saw the glass turning counter clockwise, rewinded and saw it turning clockwise. Like the spinning dancer illusion. Did anyone else experience this?
That glass wasn't turning clockwise, they were both going anti, very clearly too. not dissing or anything, love your videos, My OCD just couldn't let that one slide haa! Keep up the good work dude.
I have often heard, that the movement is due to the movement of the gas molecules rather than the kinetic energy of the photons, but it's even better to see that it seems to be right.
7:20... you can de-focus the Laser to a larger beam spot to reduce the power density and not burn the coating on the vanes. If your laser does not have an adjustable focus you can use a appropriate glass lens to de-focus the beam spiot.
Here is a hint for the future: If you want to see if something rotates, and in what direction, use a very thin wire of known length, thickness, and known properties of the metal. It will act as a spring, its behavior can be calculated, and measured. Obviously it needs to stay in its elastic range of motion so that it does not get permanently twisted, this would ruin the caculations. And you can perform precision experiments on it to see if it is consistent with caculations. With a well-mounted, well-understood and well-maintained wire filament like that, you can do experiments to measure the gravitational constant, the mass of earth, and from there calculate the masses of a great number of other objects in the solar system, and then other stars, and ultimately these precision experiments are tied into our understanding of the mass of the universe. It allows you to know the force based on the distance of rotation. Good reasons to use a wire filament in my opinion.
The issue with the string is that was it gets twisted, it gets shorter and the tension increases. It eventually provides the resistance to stop the spinning. Without energy being put in to keep the twist, it untwists. That's what I thought everyone was saying before as being a factor.
I think the reason the bulb stops rotating is that the string has twisted slightly, which lifts the bulb slightly, so that gravity stops further rotation. When you turn off the lights, the rotation force on the bulb is removed, so the twisted string is able to untwist and rotate the bulb the other way, until it twists up in the other direction, and goes back and forth like a pendulum.
I think the rule demonstrated here is that the net angular momentum of a system is conserved. The vanes spinning one way are balanced by the torque on the string in the other. Satellites use a similar system to stay oriented without thrusters.
You could direct your laser through a small concave lens, befor it hits the radiometer. That should spread the light a bit more over the black tiles and prevent the burning of the black coating.
The way I see it the friction of the rotor bumping against the glass tube above it may very well be contributing to the inertia imparted to the glass envelope. If I recall correctly in the video repairing the radiometer there was a point where the vacuum was too great and the rotor did not spin. If it was moving based on light pressure theoretically there should never be a point where there could be too much vacuum for the device to operate. One interesting thing I've noticed is that human beings can feel light not just as heat but also a sensation that could be described as light pressure. I haven't found a hypothetical mechanism for what's taking place but it's an interesting quirk of human biology. I also found out that it's rather irritating to shine a laser at the middle of the forehead with your eyes closed again I haven't found a reason that this should be possible. That is at least not within mainstream science.
I think the issue with the sting is not that is is "wound", but that after the glass stops spinning the string "unwinds", You need to isolate the glass from the string to prove that glass spins again the other way is NOT from the string.
Glial - it does matter what he is if he is stichting together different parts of a video, taking them out of context, creating strawmans and outright lies about it. It is sad, but now he behaves like Anita did.
+Glial Cell Culture His content has really gone downhill since he started making stuff up. He used to be the guy I watch who debunks fake stuff and I liked hearing about his opinions. Because he has changed, it directly affects the quality of the content he produces. Especially considering the types of videos he normally makes. So yeah, it does matter to me.
+cody'slab that's not what people were talking about, they were talking about when the bulb changed directions after the lights were turned off. you said it changed directions because of friction, they were saying that it changed directions because the string was unwinding.
I think it is not friction what makes the glass stop in the first place, but the torque created by the suspending thread after it rotates a bit. Once it starts spinning, It makes no sense that it is friction (or better said, viscosity) that stops it if it was already spinning.
I would have simply said that the string while not giving anything to the reaction,was in fact taking away some because once it got wound up, just like anything wound to its maximum, it stopped your device from continuing to spin, which in the end prohibited it from accelerating to its peak potential. If you had some kind of really slick little bearing to dangle the device from you might be able to get it to spin much faster.
Any Element that has a dominate Nuclear Right Hand Spin is dominantly North-Polarity and any Element that has a dominantly Left-Hand Spin is a South Polarity. When freezing a Right-Hand Spin Element, it will change the directional Nuclear Spin and become a South-Polarity, as will a Left-Hand Spin Element, will go from a South-Polarity to a North-Polarity when very cold. This is why the Crookes Radiometer changes the direction of its Spin, when made to be cold. Robert Shrewsbury March 11/2022
KrazeeCain yeah sometimes I like push, but at the same time it's like... lemme get to it when. I want to. make your subscriber box be a bit more reliable
Both the vanes and the glass were rotating anticlockwise as viewed from the top contrary to your comment. Not sure what that means for the question of light pressure but there is definitely an atmosphere inside the glass which to means the whole rotation is due to the friction of the rotating gas.
Next time you make a spinning glass experiment make sure you put clear marks so people can actually see which way it is spinning. Don't forget that we only see 2D image. The spots on both sides look exactly the same. There is almost no way to tell which way it was spinning and that was the whole point of the experiment!
@Cody At 2:40 the rotation when you turned the lights off might of been caused by the string that was wound up releasing its built up rotation. Much like a toy plane and a rubber band, only much weaker.
3:02 I think the final counter-clockwise spin on the glass may also be due to the twist on the string rolling itself straight rather than the blades releasing heat, but I could be wrong. You should let that rotation play out all the way and see if it springs back a fraction as far clockwise after that
It would be great to see a Radiometer with black and silvered vanes. The reason being that photon pressure is double when reflected from a mirror and only single when absorbed by the black surface. This would allow you to determine if there are any measurable effects from photon pressure. I would suspect the effect is not measurable in your lab situation. A rough calculation puts solar photon pressure at around 9mg/m^2 at sea level. If you were generous you could assume 100cm^2 over the surface of the radiometer. This would give something like 0.9mg of force if you allow that the 300W bulbs can produce sunlight levels of light. About the weight of a single grain of table salt.
+Sean Nanoman: "The reason being that photon pressure is double when reflected from a mirror and only single when absorbed by the black surface. " ==I thought the photon pressure is 0 when it is reflected. If I send a 700 nm photon onto a mirror and it reflects back, do I get a 700 nm photon back? If the photon did a push, then that means the photon lost energy and the wavelength would be larger. Photons aren't balls of matter. Newtonian physics does not work on them.
Yeah, I don't really get it either. That gem was from a YT video by Isaac Arthur on the topic of laser sails for spacecraft. His videos are really great, you should check them. Anyways I thought if the pressure received from the photons could be varied it would be easy to determine if photon pressure was the cause of the motion.
He seemed to indicate that in fact you get twice the momentum kick by using a reflective surface than you would by using an absorptive surface. It's all covered under solar sails. You would have to ask yourself why solar sails are reflective if we are to use light pressure to push them.
the heat might expand the material in the glass from the side the light is hiting it more intensive with the obvious result of changing a bit the gravity center so a movement is the result .
another simple way to prove it's not light pressure is the fact it spins counterclockwise. here's the explanation: when the light hits the black surface, all of the momentum is transferred to the surface, thus giving it x momentum, when the light had x momentum. Now when light hits a shiny object like a mirror, the light hits it and then bounces back, otherwise you can't see yourself. Since the light came in with x momentum, and bounces away with x momentum, the mirror most move at 2x momentum to conserve momentum. A simple way mathematically to show this is 1 east (light) + 0 west = 1 east (black) + 0 west = 2 east (mirror) + 1 west (light).
Rather than friction of the rotor balancing the force on the glass, I think the string is acting as a torsion balance and thus stopping the rotation of the glass case. I guess you could even use it to measure the small torque that it is produced on the glass.
If you wanted to use the laser without risking damage to the surface you could try making a beam expander for it. They aren't terribly complicated to get aligned well enough for something like this. Just a thought.
hey cody, I'm a petroleum engineering student from Austria and I really enjoy watching your videos. I was wondering if it was possible for you to buy crude oil and use it to create your own selfmade fuel. maybe you could also see how the fractional destillation would work in your pressure container. keep up the amazing work Schöne Grüße Lutz ;D
I am not following your explanation in some parts of this. I need help understanding why the reasoning used for the explanation of the glass turning in the first experiment does not apply to the upside down experiment? Not sure what you mean by 'glancing blow' and the vortex you mention. Thanks.
Hi Cody, just wondering if you had planned on doing another video with an update on the magnet implanted in your finger. Just wondering how it was holding up
Ken Wheeler did an experiment with a radiometer, using different colors of light. Red-blue wouldn't spin the radiometer, but purple would spin the fins.
Hey, Cody, I was thinking, if you just hung some blankets from the walls, you should be able to reduce the echo effects in the room. there are, of course better sound pads that people use, heck, one youtuber stacked a bunch of bath towels into a frame, and they worked as good if not better than proffessional foam panels. but still, blankets should dampen it, and it's a quick easy fix.
Although it requires a vacuum, could you put a visible gas (such as chlorine) into the radiometer (albeit in small amounts) to visualize the flow of gas within?
Hello Cody, great vlogs. I still think the spin of the glass is due to the friction of the spin that create the noise. The noise is a sign of friction. What do you think?
It was kind of hard to see which was the glass was spinning. There were a lot of times I couldn't tell if the spot I was looking at was on the front or the back of the bottle. Not that you should redo this experiment, but in the future, some small mark in marker or a sticker would have been helpful.
My initial thought was that the halting of the glass' rotation was due to twisting tension on the suspending thread, and that the counter-rotation after the lights were turned off was due to that tension being released again. Was the thread attached to the radiometer in such a way that it would not twist? Because if so, then I'd imagine that some amount of friction would be present in whatever is the mechanism that allows it to freely rotate.
i have a question: so in the second run the planes where not spinning do to friction making the whole glass spin. I was wondering that wouldn't the reason why the whole glass was spinning is because the planes where releasing heat and since friction prevented the planes from spinning then the planes pushed the whole glass, just like in the first run once it 'finished' spinning it started spinning counter due to heat release?
As you add thermal energy which causes a miniscule increase to measurable mass, is that mass enough to cause the thread to stretch? If so could the thread fibers unwinding with the stretching be the cause of the rotation of the radiometer?
Hi Cody, love your videos, could the glass be spinning in the opposite direction because of precession (the glass bead at the top of the pin spinning inside the glass tube)?
If you hold a cup of coffee or tea and turn your whole body on the spot with it, you see the contents turn in the opposite direction to that of your spin. This kinda reminds me of that.. :D
i was of the understanding that they work due to the ejection of electrons via photon absorption on the black side and due to newtons laws, the electron goes one way (striking the glass, causing to rotate) and the veins spin the opposite...
! thought the shinny side reflected the light pushing it and the darker side absorbed the light pulling it ? It's seems to be the opposite ? What am i missing ?
That's really interesting,I wonder if I left my radiometer on my desk in full sun,how far would it move over a long period. Another idea would be to coat the glass with a one sided mirror,to let light in but not so much out. I guess that would dim the light going in significantly though.
i know you probably get this a lot but are you atill working on the precious metals series? thanks and i love ypu videos great stuff, thanks for teaching me so much
Will the HERTZ spark gap electromagnetic, radio wave transmitter and receiver experiment work in full vacuum? I can not find any physical experiment and study paper or a video done on this topic showing us the results. I do understand we can not get full vacuum but this does not mean we can't get close and use math to calculate to the full vacuum. Can you put spark gap transmitter, reflector and receiver in a vacuum chamber and use necessary equipment to measure power input, received output, electromagnetic waves and radiation created, while trying to get full vacuum? If this process recorded at different vacuum points with findings of each equipment we should be able to calculate end point. We also could take this one step farther! After the removal of atmospheric air test, we could purge the chamber with noble gasses one at a time and repeat this experiment using each gas separately. This could give us different results for atmosphere, argon, neon and so on. Is this test possible for you to do? If not, can you ask someone who may be able to do this experiment? Thank you
I'm sorry to tell you that but actually Britain has the most impractical and unsafe socket standard. There is a reason why the rest of Europe uses the German standard as well as quite a big part of the rest of the world. I can probably talk for a few hours explaining all the reasons why the German standard is better that all the others.
You should remove the (re-upload) bit in the subject. You only just recently uploaded this so it isn't so much a reupload as it was an adjustment. People will see re-upload and assume it was an old video (and not click.)
I love how codys videos aren't "productions" but just showcasing his love for learning and sharing knowledge
Cody never misses a chance to keep some extra mercury around the house if at all possible, the love affair never ends
Great experiment!
hey its that guy, what you doin here. and what videos you got commin up
Keystone Science Hay fancy meeting you here. I love your videos.
BTW The Backyard Scientist gave you a shout out.
I first saw the glass turning counter clockwise, rewinded and saw it turning clockwise. Like the spinning dancer illusion. Did anyone else experience this?
I'm still having trouble seeing it go clockwise!
1:57 I only see counter-clockwise
I had the exact same thing happen, I was 100% certain it was going counter clockwise the first time around.
every time I re-watch, the glass seems to be spinning counter clockwise...
At 2:09 you can see a spot near the top of the glass move over the center tube which makes it easier to see it moving clockwise.
0:30
There it is, I don't know how to explain it, but right there is why I love this channel.
I like that you are not afraid to re-upload (re-comment)
What a beautiful experiment! Turn light on to see result, turn light off for control test. I love it!
From a nonscientific guy youve kept me watchin for about 2 yrs now. Good job bud
Codys that cool science kid that everyone wants to be friends with.
How long has it been since you were in school?
That kid is a myth nowadays
There was a cool science kid everyone wanted to be friends with?
The light from your great videos keeps me alive
That glass wasn't turning clockwise, they were both going anti, very clearly too. not dissing or anything, love your videos, My OCD just couldn't let that one slide haa! Keep up the good work dude.
what? 2:05 they are clearly spinning in opposite directions.
I get to rewatch the reupload what a relief
Maybe the reason it stopped was because if the string. It did not have enough powered to keep twisting that string. This was a great video. :)
I was going to fall asleep but
Cody upload a video
I have often heard, that the movement is due to the movement of the gas molecules rather than the kinetic energy of the photons, but it's even better to see that it seems to be right.
I think you are right, Cody. The dominant effect is from the thermodynamics.
Only Cody could make a ten-minute video on a glass tube with metal in it suspended by a string
Excellent science demonstration - Top marks for you Cody!
Thank Cody for the explanation about the string!
Cody, good job! Keep it up. Proud of you.
7:20... you can de-focus the Laser to a larger beam spot to reduce the power density and not burn the coating on the vanes. If your laser does not have an adjustable focus you can use a appropriate glass lens to de-focus the beam spiot.
I feel like this is a good demonstration of conservation of momentum and how force causes a change in momentum (F=dp/dt)
Here is a hint for the future: If you want to see if something rotates, and in what direction, use a very thin wire of known length, thickness, and known properties of the metal. It will act as a spring, its behavior can be calculated, and measured. Obviously it needs to stay in its elastic range of motion so that it does not get permanently twisted, this would ruin the caculations. And you can perform precision experiments on it to see if it is consistent with caculations.
With a well-mounted, well-understood and well-maintained wire filament like that, you can do experiments to measure the gravitational constant, the mass of earth, and from there calculate the masses of a great number of other objects in the solar system, and then other stars, and ultimately these precision experiments are tied into our understanding of the mass of the universe. It allows you to know the force based on the distance of rotation.
Good reasons to use a wire filament in my opinion.
The issue with the string is that was it gets twisted, it gets shorter and the tension increases. It eventually provides the resistance to stop the spinning. Without energy being put in to keep the twist, it untwists.
That's what I thought everyone was saying before as being a factor.
6:10 for reason of re-upload
quackqwack a
quackqwack I
I think the reason the bulb stops rotating is that the string has twisted slightly, which lifts the bulb slightly, so that gravity stops further rotation. When you turn off the lights, the rotation force on the bulb is removed, so the twisted string is able to untwist and rotate the bulb the other way, until it twists up in the other direction, and goes back and forth like a pendulum.
I think the rule demonstrated here is that the net angular momentum of a system is conserved. The vanes spinning one way are balanced by the torque on the string in the other. Satellites use a similar system to stay oriented without thrusters.
Genau richtige Uploadzeit für europäische Frühaufsteher :)
elegant set of experiments. good job
You could direct your laser through a small concave lens, befor it hits the radiometer. That should spread the light a bit more over the black tiles and prevent the burning of the black coating.
I like the re upload better than the original one.
Height, everyone! Welcome back to Cody's Lab.
Are you still in the mars one program?
he should be, mars one is kind of stranded right now though
Yea they actually just announced the next astronauts to go into training for the mars one missions *I think*
Cody, gotta say I like the new channel image! You've educated me about chemicals and elements more than any high school teacher ever did :^)
Your video's blow my mind.... tnx for the awesome content, keep it up!
I believe a bath of mercury is also a good dampening solution?
The way I see it the friction of the rotor bumping against the glass tube above it may very well be contributing to the inertia imparted to the glass envelope. If I recall correctly in the video repairing the radiometer there was a point where the vacuum was too great and the rotor did not spin. If it was moving based on light pressure theoretically there should never be a point where there could be too much vacuum for the device to operate. One interesting thing I've noticed is that human beings can feel light not just as heat but also a sensation that could be described as light pressure. I haven't found a hypothetical mechanism for what's taking place but it's an interesting quirk of human biology. I also found out that it's rather irritating to shine a laser at the middle of the forehead with your eyes closed again I haven't found a reason that this should be possible. That is at least not within mainstream science.
I think the issue with the sting is not that is is "wound", but that after the glass stops spinning the string "unwinds", You need to isolate the glass from the string to prove that glass spins again the other way is NOT from the string.
Last time i was this early Thunderf00t was a skeptic.
2 days is a long time on the internet
It's sad, I used to enjoy watching their videos.
Glial - it does matter what he is if he is stichting together different parts of a video, taking them out of context, creating strawmans and outright lies about it.
It is sad, but now he behaves like Anita did.
+Glial Cell Culture His content has really gone downhill since he started making stuff up. He used to be the guy I watch who debunks fake stuff and I liked hearing about his opinions. Because he has changed, it directly affects the quality of the content he produces. Especially considering the types of videos he normally makes. So yeah, it does matter to me.
i think the last time that word really applied to him cody had like 500 subscribers.
+cody'slab that's not what people were talking about, they were talking about when the bulb changed directions after the lights were turned off. you said it changed directions because of friction, they were saying that it changed directions because the string was unwinding.
First, you take the Sprengel Pump, and you smooth it out with a bunch of schleem. The schleem is then repurposed for later batches.
Very cool Cody. Love your videos buddy!
I think it is not friction what makes the glass stop in the first place, but the torque created by the suspending thread after it rotates a bit. Once it starts spinning, It makes no sense that it is friction (or better said, viscosity) that stops it if it was already spinning.
That's actually what I mentioned! When you wind a string up with a heavy thing weighing it down it will wind back the other way.
I would have simply said that the string while not giving anything to the reaction,was in fact taking away some because once it got wound up, just like anything wound to its maximum, it stopped your device from continuing to spin, which in the end prohibited it from accelerating to its peak potential.
If you had some kind of really slick little bearing to dangle the device from you might be able to get it to spin much faster.
Any Element that has a dominate Nuclear Right Hand Spin is dominantly North-Polarity and any Element that has a dominantly Left-Hand Spin is a South Polarity. When freezing a Right-Hand Spin Element, it will change the directional Nuclear Spin and become a South-Polarity, as will a Left-Hand Spin Element, will go from a South-Polarity to a North-Polarity when very cold. This is why the Crookes Radiometer changes the direction of its Spin, when made to be cold. Robert Shrewsbury March 11/2022
Finally a guy who listened in science class!😉
need to stop posting these so late some people need sleep... but have to watch when you get the notification....
Sheldon Kibby i think that would be hard, it's always late somewhere. ;)
GoatUnicorn does a GoatUnicorn even sleep??
Sheldon Kibby probably scheduled so that the bulk of the viewers have something to watch when they wake up
I just have notifications turned off, RUclips already takes over way too much of my life, I don't need it interrupting more of it...
KrazeeCain yeah sometimes I like push, but at the same time it's like... lemme get to it when. I want to. make your subscriber box be a bit more reliable
Both the vanes and the glass were rotating anticlockwise as viewed from the top contrary to your comment. Not sure what that means for the question of light pressure but there is definitely an atmosphere inside the glass which to means the whole rotation is due to the friction of the rotating gas.
Gotcha, thanks
Next time you make a spinning glass experiment make sure you put clear marks so people can actually see which way it is spinning. Don't forget that we only see 2D image. The spots on both sides look exactly the same. There is almost no way to tell which way it was spinning and that was the whole point of the experiment!
I keep remembering Cody's Slab
@Cody At 2:40 the rotation when you turned the lights off might of been caused by the string that was wound up releasing its built up rotation. Much like a toy plane and a rubber band, only much weaker.
a sprengel pump sounds like something right out of Rick and morty
3:02 I think the final counter-clockwise spin on the glass may also be due to the twist on the string rolling itself straight rather than the blades releasing heat, but I could be wrong. You should let that rotation play out all the way and see if it springs back a fraction as far clockwise after that
Awe damnit! you already address that, this is why I shouldn't keep your videos on backlog!
It would be great to see a Radiometer with black and silvered vanes. The reason being that photon pressure is double when reflected from a mirror and only single when absorbed by the black surface. This would allow you to determine if there are any measurable effects from photon pressure. I would suspect the effect is not measurable in your lab situation.
A rough calculation puts solar photon pressure at around 9mg/m^2 at sea level. If you were generous you could assume 100cm^2 over the surface of the radiometer. This would give something like 0.9mg of force if you allow that the 300W bulbs can produce sunlight levels of light. About the weight of a single grain of table salt.
+Sean Nanoman:
"The reason being that photon pressure is double when reflected from a
mirror and only single when absorbed by the black surface. "
==I thought the photon pressure is 0 when it is reflected.
If I send a 700 nm photon onto a mirror and it reflects back, do I get a 700 nm photon back?
If the photon did a push, then that means the photon lost energy and the wavelength would be larger.
Photons aren't balls of matter. Newtonian physics does not work on them.
Yeah, I don't really get it either. That gem was from a YT video by Isaac Arthur on the topic of laser sails for spacecraft. His videos are really great, you should check them. Anyways I thought if the pressure received from the photons could be varied it would be easy to determine if photon pressure was the cause of the motion.
+Sean Nanoman:
Then that guy, Isaac Arthur, is wrong. Reflection doesn't cause the reflected photon to lose energy.
He seemed to indicate that in fact you get twice the momentum kick by using a reflective surface than you would by using an absorptive surface.
It's all covered under solar sails. You would have to ask yourself why solar sails are reflective if we are to use light pressure to push them.
Awesome video as always!
love you're videos you are the best every video is interesting and you have inspired me to do some experiments of my own love your videos.
2:50 this is very trippy...
just like spinning woman's shadow
the heat might expand the material in the glass from the side the light is hiting it more intensive with the obvious result of changing a bit the gravity center so a movement is the result .
another simple way to prove it's not light pressure is the fact it spins counterclockwise.
here's the explanation: when the light hits the black surface, all of the momentum is transferred to the surface, thus giving it x momentum, when the light had x momentum. Now when light hits a shiny object like a mirror, the light hits it and then bounces back, otherwise you can't see yourself. Since the light came in with x momentum, and bounces away with x momentum, the mirror most move at 2x momentum to conserve momentum. A simple way mathematically to show this is 1 east (light) + 0 west = 1 east (black) + 0 west = 2 east (mirror) + 1 west (light).
Rather than friction of the rotor balancing the force on the glass, I think the string is acting as a torsion balance and thus stopping the rotation of the glass case. I guess you could even use it to measure the small torque that it is produced on the glass.
you could try adding a fishing swivel to the string that way you can rule out the effects of the string becoming twisted.
"Hide everyone, welcome back to Cody's lab"
i lov the sound it makes
If you wanted to use the laser without risking damage to the surface you could try making a beam expander for it. They aren't terribly complicated to get aligned well enough for something like this. Just a thought.
this is Cody's fidget spinner. pretty cool, huh?
codys up late cranking out new vids!
Cody's Lab I really like your videos and how you explain them!
(◕‿◕)
hey cody, I'm a petroleum engineering student from Austria and I really enjoy watching your videos. I was wondering if it was possible for you to buy crude oil and use it to create your own selfmade fuel. maybe you could also see how the fractional destillation would work in your pressure container.
keep up the amazing work
Schöne Grüße Lutz ;D
Very interesting results
I am not following your explanation in some parts of this. I need help understanding why the reasoning used for the explanation of the glass turning in the first experiment does not apply to the upside down experiment? Not sure what you mean by 'glancing blow' and the vortex you mention. Thanks.
Hi Cody, just wondering if you had planned on doing another video with an update on the magnet implanted in your finger. Just wondering how it was holding up
Ken Wheeler did an experiment with a radiometer, using different colors of light. Red-blue wouldn't spin the radiometer, but purple would spin the fins.
Hey, Cody, I was thinking, if you just hung some blankets from the walls, you should be able to reduce the echo effects in the room. there are, of course better sound pads that people use, heck, one youtuber stacked a bunch of bath towels into a frame, and they worked as good if not better than proffessional foam panels. but still, blankets should dampen it, and it's a quick easy fix.
Although it requires a vacuum, could you put a visible gas (such as chlorine) into the radiometer (albeit in small amounts) to visualize the flow of gas within?
What is the song at the end of this (and many other) videos? I can't find it anywhere.
mathig nihilcek it is so bueno inspiration rock your welcome
So flipping cool... I don't get any of the science in this lol but it's cool & I love Cody 😝
Hello Cody, great vlogs. I still think the spin of the glass is due to the friction of the spin that create the noise. The noise is a sign of friction. What do you think?
What was the purpose of the steel wool at the end?
It was kind of hard to see which was the glass was spinning. There were a lot of times I couldn't tell if the spot I was looking at was on the front or the back of the bottle. Not that you should redo this experiment, but in the future, some small mark in marker or a sticker would have been helpful.
And maybe put the camera a bit higher to create a perspective that makes it easier to differentiate between front and back.
2:00 why is it spinning though? Is it that sensitive that light pushes it? Could this be used for Energy?
If you turn the radiometer over the finns would turn the other way, Cody, so in the last experiment the glass turns with the finns.
My initial thought was that the halting of the glass' rotation was due to twisting tension on the suspending thread, and that the counter-rotation after the lights were turned off was due to that tension being released again. Was the thread attached to the radiometer in such a way that it would not twist? Because if so, then I'd imagine that some amount of friction would be present in whatever is the mechanism that allows it to freely rotate.
good work cody (: keep it up
i have a question: so in the second run the planes where not spinning do to friction making the whole glass spin. I was wondering that wouldn't the reason why the whole glass was spinning is because the planes where releasing heat and since friction prevented the planes from spinning then the planes pushed the whole glass, just like in the first run once it 'finished' spinning it started spinning counter due to heat release?
I was wondering if you picked up speech patterns from your Dad who has a deviated septum. I was noticing the cadence of your breathing.
James Ortiz how do you know this?
James Ortiz Please tell us more about this
🤔 Very interesting!
PFKNTHETA // I asked Cody if he had a deviated septum in an earlier vid. he replied his dad did.
Jeremy Chai I noticed a tiniest amount of what sounded like a gasp in Cody's speech pattern.
As you add thermal energy which causes a miniscule increase to measurable mass, is that mass enough to cause the thread to stretch? If so could the thread fibers unwinding with the stretching be the cause of the rotation of the radiometer?
Hi Cody, love your videos, could the glass be spinning in the opposite direction because of precession (the glass bead at the top of the pin spinning inside the glass tube)?
If you hold a cup of coffee or tea and turn your whole body on the spot with it, you see the contents turn in the opposite direction to that of your spin. This kinda reminds me of that.. :D
i was of the understanding that they work due to the ejection of electrons via photon absorption on the black side and due to newtons laws, the electron goes one way (striking the glass, causing to rotate) and the veins spin the opposite...
That was alot of juice do you think it could have created a magnetic feild that could also effect the results?
I wonder if the laser had been wider and not focused; would it still have vaporized the blacking?
! thought the shinny side reflected the light pushing it and the darker side absorbed the light pulling it ?
It's seems to be the opposite ? What am i missing ?
Yeah thís is really wow! In a scienceway wow, yeah!!
Kind-a-cool yes indeed, and on that one&only typical nice&exact Cody's-Lab way!
Very interesting
That's really interesting,I wonder if I left my radiometer on my desk in full sun,how far would it move over a long period. Another idea would be to coat the glass with a one sided mirror,to let light in but not so much out. I guess that would dim the light going in significantly though.
i know you probably get this a lot but are you atill working on the precious metals series? thanks and i love ypu videos great stuff, thanks for teaching me so much
Will the HERTZ spark gap electromagnetic, radio wave transmitter and receiver experiment work in full vacuum? I can not find any physical experiment and study paper or a video done on this topic showing us the results. I do understand we can not get full vacuum but this does not mean we can't get close and use math to calculate to the full vacuum. Can you put spark gap transmitter, reflector and receiver in a vacuum chamber and use necessary equipment to measure power input, received output, electromagnetic waves and radiation created, while trying to get full vacuum? If this process recorded at different vacuum points with findings of each equipment we should be able to calculate end point. We also could take this one step farther! After the removal of atmospheric air test, we could purge the chamber with noble gasses one at a time and repeat this experiment using each gas separately. This could give us different results for atmosphere, argon, neon and so on. Is this test possible for you to do? If not, can you ask someone who may be able to do this experiment? Thank you
Wait power sockets don't have switches in America?
Charles Smith nope
We really love our convenience.
Charles Smith not sure where you live but in Germany I have rarely seen sockets with switches.
I'm sorry to tell you that but actually Britain has the most impractical and unsafe socket standard. There is a reason why the rest of Europe uses the German standard as well as quite a big part of the rest of the world. I can probably talk for a few hours explaining all the reasons why the German standard is better that all the others.
It gets worse:
You should remove the (re-upload) bit in the subject. You only just recently uploaded this so it isn't so much a reupload as it was an adjustment. People will see re-upload and assume it was an old video (and not click.)