Question

8. A bead appears blue in white light. What will
be its colour in blue light?​

Answer 1

Colour of any object is by the colour of light it reflects i.e if white light is incident on the object,it will reflect blue color.so it will appear blue. But if red light is incident on it,it will not reflect that and absorb it.so as it will not reflect any light it will appear black.

hope it helps....xD

Answer 2

Explanation:

An object appears blue because it reflects back the blue color of white light and absorb rest of the colors. ... The color component of white light reflects back depend upon the chemical composition of dye of the surface of the object.