# Can you see these FORBIDDEN colors?!

## Метаданные

- **Канал:** Be Smart
- **YouTube:** https://www.youtube.com/watch?v=pRJWu481ETQ
- **Источник:** https://ekstraktznaniy.ru/video/32464

## Транскрипт

### Segment 1 (00:00 - 02:00) []

- Did you know there are forbidden colors? (bright upbeat music) I've got a challenge for you. Here's a blue crayon and a green crayon. Now imagine the color between these two, blue-green, like this. That was pretty easy, right? Now I want you to picture a crayon that's the mix of these two, red and green. I'm not talking about brown or something, I want you to imagine what an actual mix of those two colors would look like. It's pretty hard, isn't it? Probably impossible, actually. And it's not your fault. It's biologically forbidden. We sense color with receptors called cone cells in our eyes that are sensitive to these wavelengths. But those cones don't send a red signal or a green signal to your brain, they don't know what color of light is hitting them, they only know how much light is hitting them that they're sensitive to, and how excited they are. But your visual system does a cool trick. It basically subtracts the green signal from the red signal. If that's a big positive value, it means you're seeing more red light. If it's negative, you're seeing more green light. But it also means you can't see equal red and green at the same time. Red and green mixed is an impossible color. We're just not wired for it. Try it for yourself. Pause this and stare at these squares cross-eyed, and tell me what you see where the colors overlap. For me, my brain just keeps flipping back and forth between green and red, it's so weird. There are also colors you can experience that don't exist in the real world at all. Look at this green square for several seconds. Don't take your eye off of it. Don't swipe away to another video. Just relax and stare. Pause if you need to. Okay, now look at a white background. You should see a red that's more vivid than any red that exists in nature. It's called super luminous red. It happens because the green cone cells in your eyes get exhausted and that mega red signal takes over. These kind of impossible colors are called chimerical colors. And there are even imaginary colors. If we could somehow just stimulate, say, these cones, your brain would perceive a green that's brighter and greener than any green possible in nature. But this is impossible because our cone sensitivities overlap. We can't just stimulate one type. Except scientists just did that. They used micro lasers to target just one type of cone cell, and people actually saw that hyper green. The scientists named this color olo. But unless your crayons start shooting lasers at you, you probably won't see that anytime soon. Follow me for more cool science videos.