vision - Why do objects of a given color appear white under light of that color? - Physics Stack Exchange
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![](https://i.stack.imgur.com/BRxDo.jpg)
Under light from the sun, a red object will scatter the red component of light, and absorb all others. Hence, the human eye perceives it as "red". White objects scatter all wavelengths of light.
![](https://i.stack.imgur.com/BRxDo.jpg)
vision - Why do objects of a given color appear white under light of that color? - Physics Stack Exchange