Question

Why does coal appear black in white light?
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Answer 1

because when light rays hit them, they absorb every color from the spectrum, which makes them appear black.

So even if you put them under a different colored light, they will still appear black. White is actually the exact opposite, since it reflects every color in the spectrum.

Answer 2

becoz it absorbs all the light rays passes to it.... & become of the dark colour.....