The sound wave has two types: compress-wave(P-wave) and shear-wave(S-wave); P-Wave means medium particles oscillate along the propagating direction; S-wave represents particles oscillating perpendicular to the propagating direction. It seems that sound is "polarized", but we do not sense it: because we can only hear P-wave. (S-wave cannot travel through fluid, e.g. air, water, ...)
perfect explanation,the most curious thing i learned is that you done in theatre closing one eye.i will also try that one next time in the theatre .thanks!!!!!
cool. thanks for the explanation! the animation you had on your cell phone was more informative than the red ribbon in terms of explanation the vector sum. but there were a lot of other cool explanations in this video. especially the movie theater glasses.
Your explanation, the model of sliding perpendicular E fields, and the demonstrations REALLY helped me understand. ChatGPT's explanation alone wasn't clear enough for me.
Your model of a wave is very good. The moment you switched it to the circular polarized wave was like boom and suddenly it made sense to me why the iPhone display did not turn black. It is because the circular polarized light always has an amplitude isn't it? I mean the function has no roots. Am I correct with this?
1. Is a linear polarizer defined by the electric or magnetic field, and is it defined by what it transmits or what it blocks? (a green color filter looks pink, for example) 2. where can i find more elaboration about the physics of the circular filter itself? 3. What experiments can I do to correctly define the polarity of light (or the filter) that I have? Am I looking at a vertical electric field? Is the electric field that bounces off a plane perpendicular or parallel to the plane?
1. Don't confuse a colour filter for a polarising filter. Colour filters work by absorbing a CERTAIN WAVELENGTH of light: if it absorbs blue and you shine white light through it, what you will see is the white light minus the blue light = red. Polarising filters slow down / attenuate light of ALL WAVELENGTHS: they just need to be travelling in a PLANE specific to the PLANE of the polarising filter 2. I'm sure you can find loads on the internet (sorry but google can answer that one) 3. a) He already answered this in the video b) The light has a net sum vector in a certain direction: but rotating the polarising filter you can see which direction that is c) Not sure what you mean by this.
I wish this video was twice as long and had gone into twice as much detail about circular polarization and how exactly one of the light components is slowed down by a quarter phase. But I appreciate the explanation.
Thankyou so much for this very nice video first, for a long time i am looking for what is that at the 4:05 your right hand take down for the 3D glasses, I am really want to know where can buy that plastic (that looks no color one) , cause i am want to make the Circular Polarization. thankyou again !
I think that linear polarizers also block out a gradation of light up to a 45-degree angle. Light waves are not oriented horizontally and vertically, perpendicular to their direction of travel. If it were orientated in such a way, you would get light seepage when you spun your stack of polarizers around at different angles. And that's not all. They also block shear in a gradation up to a 45-degree angle as light travels omni directionally.
yeahhhahahahahaha that's amazing. it's always exciting for me to wonder and see how the effects observable to us can be transmitted to the camera (and by extension, to other corresponding devices too)
very good explanation! but to nitpick a bit, i think we learned that the speed of light is actually always 300000 km/s but what actually slows down the light is how long it takes for the light to transmit the energy in an atom of the given substance. correct me if i am wrong, but isn't that what actually causes the "lower speed of light" in optical denser substances?
There are x and y components of the e field but are there also x and y components of the b field, it's net force perpendicular to the e field's net force?
Regarding the experiment with the mirror and 3-D glasses, that demonstration is misleading in my opinion and needs to be clarified. It's true that if the experiment is done with 3-D glasses that are circularly polarized, then the lens over the open eye will appear darker in the image reflected from the mirror than the lens over the closed eye. However, if linearly polarized 3-D glasses are used, then the lens over the closed eye will appear to be darker in the reflected image. I think he should have mentioned that in BOTH cases one eye will appear darker and the only way to distinguish the linearly polarized glasses from the circularly polarized glasses is to pay attention to which eye looks darker. In my opinion, people who have not done this experiment with both types of 3-D glasses will come away from this demonstration thinking that one lens will only look darker in the mirror if circularly polarized glasses are used and that is not true.
Light is an electromagnetic wave. Its just that the electric part of light is made of two components which on average makes up the direction of the polarised light. The reason why we ignore the magnetic part is because we know it's perpendicular to the vector sum of the electric part. Or so I assume based on this video.
"My left ear....." - it was so interesting that I didn't even notice that is was shifted to the left. Someone look for a content and someone to find what's wrong.
As you are clearly the Chevy Chase of science, I hope you begin to include complimentary pratfalls in each video...thank you in advance...(and excellent video)
All my life, I have been taught that light is made of an electric field with a magnetic field (perpendicular to each other). But in this video it was explained that polarized linear light is made out of two perpendicular electric fields (that sum up to a vector in one direction), does it still have a magnetic field?
