I've got a reasonable guess - I think the camera's lens has an anti-reflective coating that is specifically filtering out the fringes! A student with glasses also couldn't see the fringes with her glasses on. I guess you'll have to get two pieces of glass and try this yourself! Physics!
I love your videos. I thought I was already pretty good with optics. I can solve complicated problems with all the formulas and everything, but you've really helped me understand it better conceptually.
Thanks, you explain things well, not too long and drawn out, nice bite size chunks. It's very difficult recording what you can actually see in an experiment with a camera that seems determined to alter it. Then again I sometimes doubt my eyes and wonder if THAT is where the error is, leading me to "see" things that perhaps aren't literally there - Or maybe they are only "there" from that position in that lighting etc etc. Sorry, I'm waffling now. Anyway thanks for the videos. Nice and clear.
I came here looking for principals on phasing shifting a wave and was not disappointed. However have you ever experimented with phase shifting a gravity wave? If so do you think something similar would apply to its deflection through certain materials? I have really only ever worked with phase shifting electrical frequencies at my job and don't have any other experience with any other waves. I'm just really curious about gravity and how to affect and study it.
chris brown Whoa. It's hard enough to even detect a gravity wave, but I believe the theory should be symmetric enough to imply the same sorts of phase shifting as light!!!
So in theory one could potentially phase shift and a gravity wave using reflective material that is of different thickness. After that you just need a way to amplify it and redirect. This would enable floating and weightless travel. Maybe you could use the same principals that are used with sound waves...
chris brown Holy cow. What is a material that is gravitationally reflective?!? And how cool would a gravitational amplifier be? We'll need a gravity transistor. Quick - let's get patenting!!!!
Shouldn't every material be gravitationally reflective to a degree? If a wave passes through it I imagine some should reflect with the density of the material changing how much of the wave is reflected. If nothing reflects it then certainly some could slow the wave down with density. Just an idea I guess.
Dear Doc Schuter, If there are 4 surfaces why we take in count just 2 reflections? What hapens with the interference produced by the uper glass surface reflection (let´s call ray 0) and the lower glass surface reflection (let´s call ray 3) interacting with rays 1 and 2? That is, Why we can discard those other two rays?. I will apreciate your answer. Best regrads
+Alfpajarito A great question, indeed! This combination is the one that most directly shows a fringe pattern, since the path length changes based on the plate separation. The ones that show interference between the top and bottom of each plate would not vary since the glass thickness is consistent. There are higher-order reflections, but they are very weak in intensity, of course.
+Doc Schuster Sory to bother you again with my questions (and sory because my bad english, I´m trying to do my best haha). 1- What means "the glass thickness is consistent"? 2- Why the interference between ray 0 and ray 1 is not considered like a thin film interference? that is, why it is diferent if the film is thin or "fat" like in this case?
please can u explain me that "why" the light wave in reflect from some surfaces whith a phase shift? I understand that reflection from small n to big n have a 180 phase shift, but "why????"
thank u about that videos but both of us know that this is not a perfect explanation of reflection phenomenon! I think that my question can be replied in electromagnetic and I will find it! anyway thank you Doc Scuster!
علی مسعودی I'm not trying to be smug. I really do want you to think of ANY impedance mismatch as causing reflections. Wave theory is wave theory! The full electromagnetic response will have all those nasty phase and group velocities in it. Ick.
![[8] Air Wedges: Further Compromising Doors](http://i.ytimg.com/vi/jHnNsQ64JV8/mqdefault.jpg)
Yay! That's been my hope, to help people understand more deeply. Thanks so much for your note!
Gr8 video even after these many years❤️
I've got a reasonable guess - I think the camera's lens has an anti-reflective coating that is specifically filtering out the fringes! A student with glasses also couldn't see the fringes with her glasses on. I guess you'll have to get two pieces of glass and try this yourself! Physics!
oh my goodness this is helping me with my physics final and you're so good at keeping my attention! good on you doc!
Legend. thanks a lot! I also apreciate the examples with the robes, makes it way better to understand!
Would’ve been nice to see the reds and greens. Still a great video! Thanks!
Love your videos. Really really love them. Esp those simple tools you use to clarify concepts.
Thanks!
The wave sounds are amazing lol
thank u! that was cool!
I love your videos. I thought I was already pretty good with optics. I can solve complicated problems with all the formulas and everything, but you've really helped me understand it better conceptually.
Nice✨you just don't mug up shit!
Thanks, you explain things well, not too long and drawn out, nice bite size chunks. It's very difficult recording what you can actually see in an experiment with a camera that seems determined to alter it. Then again I sometimes doubt my eyes and wonder if THAT is where the error is, leading me to "see" things that perhaps aren't literally there - Or maybe they are only "there" from that position in that lighting etc etc. Sorry, I'm waffling now. Anyway thanks for the videos. Nice and clear.
Sir really i love the way you teach
It is very helpful for me
nice way of explanation
Great! Btw have you seen the Physics galaxy channel, what are your views
Amazing! Preparing for ap physics 2!
Thank you :')
if i wanted standing waves to be produced will it form even when phase change is 0
10:23 to 10:26
thank you for the explanation!
but in the wedge of air, why did we ignore the first direct reflection of the light?
How do I calculate the distance of gap between each constructive interference or destructive interference?
Aye Doc i have a doubt the formula in my text book looks different does all formula work the same?for bright and dark fringes
Why is the width of the bright or constructive fringe wider than the dark destructive fringe?
I came here looking for principals on phasing shifting a wave and was not disappointed. However have you ever experimented with phase shifting a gravity wave? If so do you think something similar would apply to its deflection through certain materials? I have really only ever worked with phase shifting electrical frequencies at my job and don't have any other experience with any other waves. I'm just really curious about gravity and how to affect and study it.
chris brown Whoa. It's hard enough to even detect a gravity wave, but I believe the theory should be symmetric enough to imply the same sorts of phase shifting as light!!!
So in theory one could potentially phase shift and a gravity wave using reflective material that is of different thickness. After that you just need a way to amplify it and redirect. This would enable floating and weightless travel. Maybe you could use the same principals that are used with sound waves...
chris brown Holy cow. What is a material that is gravitationally reflective?!? And how cool would a gravitational amplifier be? We'll need a gravity transistor. Quick - let's get patenting!!!!
Shouldn't every material be gravitationally reflective to a degree? If a wave passes through it I imagine some should reflect with the density of the material changing how much of the wave is reflected. If nothing reflects it then certainly some could slow the wave down with density. Just an idea I guess.
chris brown Ok - absorption and isotropic reemission, sure. But reflection? Vector reflection? Like a mirror?!? That sounds much trickier.
Cheers!
I wish my classes were as Interesting
Let's obey the law of reflection!
what does effective length mean
Dear Doc Schuter, If there are 4 surfaces why we take in count just 2 reflections? What hapens with the interference produced by the uper glass surface reflection (let´s call ray 0) and the lower glass surface reflection (let´s call ray 3) interacting with rays 1 and 2? That is, Why we can discard those other two rays?. I will apreciate your answer. Best regrads
+Alfpajarito A great question, indeed! This combination is the one that most directly shows a fringe pattern, since the path length changes based on the plate separation. The ones that show interference between the top and bottom of each plate would not vary since the glass thickness is consistent. There are higher-order reflections, but they are very weak in intensity, of course.
+Doc Schuster Sory to bother you again with my questions (and sory because my bad english, I´m trying to do my best haha). 1- What means "the glass thickness is consistent"? 2- Why the interference between ray 0 and ray 1 is not considered like a thin film interference? that is, why it is diferent if the film is thin or "fat" like in this case?
Alfpajarito o
btw I do not see those red, green lines... they are all white..
Also the line ddi not seen any difference after u removed the paper..
Oh, and I never fall asleep during your videos or reply to a text message or open another tab or... y'know.
Can you share how to actually find the thickness of the paper this way? Is there an equation?
Evan Draplin There is, but I can't share it because I expect my students to discover the equation based on this video. Good luck!
May Allah bless all of us
For better knowledge
please can u explain me that "why" the light wave in reflect from some surfaces whith a phase shift? I understand that reflection from small n to big n have a 180 phase shift, but "why????"
علی مسعودی Do you understand reflections of waves on ropes? I have some videos on that. It's the same reason.
thank u about that videos but both of us know that this is not a perfect explanation of reflection phenomenon! I think that my question can be replied in electromagnetic and I will find it!
anyway thank you Doc Scuster!
علی مسعودی I'm not trying to be smug. I really do want you to think of ANY impedance mismatch as causing reflections. Wave theory is wave theory! The full electromagnetic response will have all those nasty phase and group velocities in it. Ick.
i love you¨
Sorry but why my textbook says the bright fringe equation is 2t+lambda/2=(m+1)lambda?Can you explain to me
Can you explain to me please?
Pew too too too too.... Pew too too too too....
2:40 religion of Light
I am studying
Dude enough with the comic routine
probably should've stopped at the beginning of the air wedge example, i know its hard to explain, but you really just are confusing people now.
It doesn't help that the camera doesn't pick up any of the fringes! Vote it down, and I'll eventually remake it. Thanks for watching.
May Allah bless all of us
For better knowledge