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Q.

Is it true that white paper reflects all the colours in the sunlight, and a blackboard absorbs all the colours in the sunlight?


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a

True

b

False  

answer is A.

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Detailed Solution

The given statement is true.
White substances are very good at reflecting all wavelengths of light. Therefore, white objects, such as white chalk, white paper, snow, milk, white jewels and white clothes, reflect all the colours of sunlight and thus appear white in colour. On the contrary, black objects tend to absorb light. Therefore, black objects, such as blackboard, black shoes, graphite, charcoal and black clothes, absorb all the colours of sunlight and therefore appear black in colour.
 
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