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  • Hey, Vsauce, Michael here, and today we are going to talk about color.

  • (Green Green, Green Green). "Gold" on, let me just "Pink" this up.

  • "Yellow?"

  • "Michael, "Orange" you going to come to the concert this evening?"

  • "I "Red" about that, there are going to be a lot of "Purple" there."

  • "I didn't "Teal" you about this earlier?"

  • "Well, look, I have to go "Brown" town first, but I'll be "White Black."

  • Colors...

  • Did you know that the human eye can differentiate 10 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 silvery things like iluminum. But, a mirror is, in reality,

  • 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. These 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 in the same way that pigment does.

  • A mirror reflects incoming light in a single outgoing direction: Specular Reflection, not

  • Diffuse. This kind of reflection creates an image of the very thing infront 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, it 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 510 nanometer range, which we perceive as green light. So, technically, a mirror

  • is a tiny, tiny, tiny bit green.

  • You may have noticed 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're actually kind of green, but

  • we should talk about white.

  • "En español, "white" es "blanco."

  • "En français, "white" est dit "blanc."

  • And in English, we have a word that comes from the same route: Black, which is the opposite

  • of 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 other 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: interference.

  • In our sky, light from the sun encounters 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 of the colors get scattered out except for

  • the longest wavelengths, the red, which is what gives a sunrise and a 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 melonen in that iris,

  • in which case your eye is going to be green, hazel, or brown.

  • Enjoy those colors, and, as always, thanks for watching.

Hey, Vsauce, Michael here, and today we are going to talk about color.


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B1 中級

鏡の色は何色ですか? (What Color Is A Mirror?)

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    VoiceTube に公開 2021 年 01 月 14 日