What witchcraft is this?
@teworth, Nay! ‘Tis Sorcery!
@teworth, *burns phone at the stake*
@Rhyzel , she turned me into a newt!
@teworth, I believe this is some kind of polarizing lens. It only let's certain wavelengths of light through at different orientations.
@Cliff Racer, Did you get better?
@HonorableSquidman, I have no practical use for one of these but now I really want one
@HonorableSquidman, it has less tok do with wavelength and more to do with the angle at which the electric and magnetic waves are oscillating (which is determined by the way the light reflects off of the pencils)
@HonorableSquidman, I don’t see how that explains how the green/red/blue are going through the yellow/magenta when the lens is held vertically. We clearly see that a section is underneath.
@Spudbee, I haven't read my Mineralogy textbook enough to either support or refute you.
@HonorableSquidman, polarizer aren't dependent on wavelength. Those were probably images with linearly polarized light of two types representing the pencils. The polarizer let's only certain polarizations through.
Now that finals are over I can be proud instead of scared of this mess.
@HonorableSquidman, I’m glad you explained it because I really didn’t have the energy to.
@HonorableSquidman, BURN THE WITCH!
@Canis Arktos, I feel your pain friend. Thanks for clarifying.
@Rhyzel , it's the same sort of thing that covers some ATM screens to stop people looking at the screen from any angle other than straight on.
@slvr, well light can bend, and remember your brain can fill in gaps in your visual field but idk if that what’s really happening with seeing through just educated guesses
@HonorableSquidman, the light isn't polarized
If you look as he turns it, the light is just diffracted along the long axis of the film. When this aligns with a pencil, you don't see a difference. When it's across pencils, though, it blurs them together.
@Canis Arktos, false, all (real world) polarizers depend on wavelength. E.g. 3D glasses let ALL uv light in, so they cook your eyes if you try to use them as sunglasses
@JuztAD00d, the screen is being viewed straight on for the entirety of the video.
@Sheep Rider, huh, I just got off a semester of optics. It's only undergraduate so... still, could you note the equation that has it as lambda dependent? I always prefer real world things to the "frictionless, massless, perfect springs..." they give us in class.
@Canis Arktos, there's generally no "equation" that's lambda dependent (unless you want to go into material science or something) it's just that at some range of wavelengths it's a polarizing film (and follows the equations you've seen), and at all others it's a clear film
@Sheep Rider, I do want to go into material science. I just finished optics and solid State this last semester. The only distance dependent... is this Fresnel diffraction vs Fraunhofer? If you don't know the particulars that's cool. Doesn't mean your wrong. I'm just trying to understand your argument.
@Canis Arktos, I'm no expert, maybe "diffract" is a better word? Or "blur in a certain direction"?
But it explains why we can see through the horizontal pencils, and why we see blurs of the other pencils even when the film is straight
@Sheep Rider, that's totally cool. A someday soon BS in physics does not mean that everyone from a magician to a Hollywood lighting expert wouldn't know 1000 things I don't. I'm not trying to dothe "umm actually..."
Still, my theory is that these aren't pencils as much as they are a special screen showing the image of pencils with polarized light. True linear polarized can give this exact type of illusion when employed on the right object. The polarized blocks all light not shown with the correct direction of polarization or it will polarize the outgoing light. I assume this to be the former of the two options. When it's at 45 degrees it gets blurry because a little of each light is getting through and getting polarized at that 45 degree angle instead of the perpendicular angles they were originally set at. Anyway, that's my theory. Not one I can claim to prove.
@Canis Arktos, why does it seem you can see through the horizontal pencils then
or why you can see the color where there aren't pencils
@Sheep Rider, again, my theory only, is maybe something to do with intensity of each color at the overlapping points??? That sounds pretty flimsy as I say it but it's the best I've got.
If I tried to support your argument (or how I understand your argument) then I'm guessing some kind of birefringence (I don't think that's the right term for here ... dang it..)where different wavelengths get effected by a different index of refraction and get split out (not unlike the Pink Floyd prism). Still that would offset the direction and not line up. Plus that film seems pretty thin for a meaningful path difference. I don't know. I'm spinning myself in knots now and trying to convince myself that I didn't fail yesterday's final. Sorry I couldn't offer a better answer. Thanks for the engaging chat at the very least!
@Canis Arktos, I really don't think this is wavelength dependent
@Canis Arktos, heh I slept 14 hours after my final yesterday
@Sheep Rider, wavelength is just another word for color
@Sheep Rider, that's correct and I may be wrong but although the screen is being viewed straight on they are changing the rotation of the small card. But again I may be wrong I don't claim to be an expert I was just stating what I thought I knew.
Now hold it diagonally
@nair kid, *singularity forms*
@nair kid, you've doomed us all!
Why can I see through the yellow and pink pencils when the lense is flipped portrait orientation?
Arts class at hogwarts
Dealing with wires all day, this would be awesome this actually worked
At least they're at the yellow and purple it goes Dim when they switch positions of the clear thing