Question : Why does a black board appears black in colour?
Option 1: It reflects black colour
Option 2: It absorbs black colour
Option 3: It reflects all colours
Option 4: It absorbs all the colours
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Correct Answer: It absorbs all the colours
Solution : The correct option is it absorbs all colours.
When light, which is a blend of different wavelengths that correspond to different colors hits the blackboard, a sizeable percentage of it is absorbed, and very little of it is reflected. The surface's characteristically dark look, which we interpret as black, is caused by the absence of reflected light. Usually a body appears black because it absorbs all the light radiations and reflects a very small portion of it.
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