Hey Vsauce! Michael here! And today, we are going to talk about color. GREEN! GREEN!(Ring! Ring!) GREEN! GREEN!(Ring! Ring!) GOLD(hold) on! Let me just PINK(pick) this up. YELLOW(Hello)! Michael, ORANGE(aren't you) going to come to the concert this evening? I RED(read) about that. There're gonna be a lot of PURPLE(people) there. I didn't TEAL(tell) you about this earlier? Oh, look, I have to go BROWN town(downtown) first, but I'll be WHITE BLACK(a while late).
Did you know that the human eye can differentiate ten million different colors? But what color is a Mirror? You might say silver, because mirrors are often illustrated that way, and to be sure, they are made out of silver or silver things like aluminum. But a mirror, in reality, is whatever color you point it at. In this green room, the mirror is green. And if you look inside a mirror, it becomes "You-Colored."
An object is whatever color it doesn't absorb. The sticky notes are orange, because when hit with typical white light, they absorb every other wavelength of visible light except for orange, which they diffuse into your eye balls. But a perfect mirror reflects all colors equally. So in a way, you could say that a mirror is White, except a mirror doesn't reflect colors the same way a pigment does.
A mirror reflex incoming light in a single outgoing direction: specular reflection. Not diffuse, this kind reflection creates an image of the very thing in front of the mirror. So as bad astronomy jokes: "A mirror is more of a smart white."
But wait a second. That is a perfect mirror, and we live in the real world where there are no perfect mirrors. Every mirror absorbs a little bit of light. Not enough that it matters, I mean, looks pretty clear to me. But when you take a look at the spectrum of light, reflected by a typical mirror, you will find that it best reflects light within the five hundred and ten nanometer range, which we perceive as green light. So technically a mirror is a tiny, tiny, tiny bit green.
You may have notice this yourself when investigating a Mirror Tunnel. This happens when two mirrors face each other, reflecting the same scene back and forth and back and forth and back and forth, with each new reflection a little bit more visual light is lost, but green least of all. That's why the reflection way down the tunnel is dimmer and greener. So maybe real world mirrors aren't smart white. They are actually kind of green. But we should talk about White.
In Spanish, "white" is BLANCO.
In French, "white" is said, BLANC.
And in English, we have a word that comes from the same root: BLACK, which is the opposite of white. How did that happen?
Well, it turns out that all of those words come from the same ancient Proto-Indo-European root word: bhleg, which meant shine, burn, flash. Some languages took it to mean the brightness of the flash: white, while others took it to mean what's left behind: the burned, black, darkness.
If you have blue eyes, your eyes aren't actually blue: in the sense that the molecules inside them are absorbing all of the wavelengths of visible light, and diffusing the blue. No! No! No! Instead, your eyes are blue for the same reason that the sky is blue: the interference.
In our sky, light from the sun encounter molecules of air, and because of the size of those molecules, light of longer wavelengths can slip on by. But shorter wavelengths crash into the particles, like blue light, and scatter, which is why we see blue when we look at the sky away from the sun. Without the air molecules, that space would just be black.
And when direct sunlight has to travel through a lot of air, almost all the colors get scattered out, except for the longest wavelengths: the red, which is what gives the sunrise and the sunset their color.
The iris of your eyeball contains a hazy layer where light can be scattered just like the sky, through a similar but slightly different process, shorter wavelengths are scattered more, making your eyes look blue. Unless of course you have some melanin in that iris, in which case your eyes are going to be green, hazel or brown. Enjoy those colors! And as always, thanks for watching!
- 「的確、正是」- To Be Sure
You might say silver, because mirrors are often illustrated that way, and to be sure, they are made out of silver or silver things like aluminum.