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Science and Technology - General Knowledge Questions
Why does a black board appears black in colour?
A)
It absorbs black colour
B)
It reflects black colour
C)
It absorbs all the colours
D)
It reflects all colours

Correct Answer :   It absorbs all the colours

Actually a black board has all colours in light or white light . So when light falls on it board absorbs all colours because all are present so no light is reflected back . That is the case when board has all colours and so it will appear black as it absorbs all colours of light that fall on it.

Published On : June 13, 2021
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