評論
打印
Don:Here's a simple demonstration you can do with cool implications.
唐:這是一個你可以做的具有很酷含義的簡單演示。
Find a large object that is brightly colored--let's make it a green door.
找一個色彩鮮艷的大物件—讓我們使它搖身一變成為一道綠色門。
Stand with that door to your side but don't look directly at it; you want it to be in your peripheral vision.
站在那扇門身邊，但不要直視,你要想它是在你的周邊視覺中。
Now, without shifting your gaze, examine the door in the edge of your field of vision.
現在,不用轉移你的目光,仔細審視在你視野邊緣的這扇門。
What color is it? Answer? It's still green.
它是什么顏色的?回答?它仍然是綠色的。
Yael:It's still green? What kind of experiment is that?
雅艾爾:它仍然是綠色的嗎?這個實驗到底想說明什么?
I thought you were going to say something happens to the color.
我以為你會說顏色發生了某些變化。
Don:That's exactly right!
唐:完全正確!
The color stays green, which means something has happened-- because nothing in your peripheral vision should have any color at all.
之所以仍然是綠色,這意味著發生了一些事情—因為在你的周邊視覺里應該應該沒有任何顏色。
Yael:Nothing in your peripheral vision should have any color? Why not?
雅艾爾:在你的周邊視覺內應該沒有任何顏色?為什么沒有呢?
Don:Because color is what we perceive when light of a particular frequency meets cones-special cells in your retina.
唐:因為顏色是特定頻率光線投射到視網膜錐細胞上我們的感知。
But the light being reflected off the door is only landing on the outside edge of your retina.
但被反射到門的光只是在你的視網膜外邊緣。
And there are almost no cones on the edges.
而且在邊緣幾乎沒有視錐細胞。
Everything we see roughly seventy-five degrees away from the point we're fixed on should be black and white.
從這一個固定的點大約七十五度我們看到的一切事物都應該是黑白兩色。
Yael:That's fascinating! But why is the door still green?
雅艾爾:太神奇了!但為什么門還是綠色的?
Don:Presumably the door remains green because vision isn't a simple matter of retinal cells.
唐:大概門仍然是綠色的是因為視覺不是簡單的視網膜細胞。
All the data your eyes send is interpreted by the brain.
你眼中的所有數據發送給大腦解讀。
Your brain knows that the door is green, so it supplies information that isn't really there to keep the image stable.
你的大腦知道門是綠色的,所以它提供信息,并不是真的在那里保持圖像穩定。
This is just one of the many ways your brain saves time and energy by making reasonably safe assumptions about the world around you.
這只是你的大腦通過對你周圍環境合理安全的假設節省時間和精力的其中一種方式。
