Q.

Is it true that a concave lens can converge the rays coming from Sun and burn a piece of paper?


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a

True

b

False 

answer is B.

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Detailed Solution

The above statement is False.
When a ray of light strikes the surface of a lens and passes through the focus of the lens, then this type of lens is known as a convex lens, a convex lens is a converging lens, and when rays coming from the Sun strike the surface of the convex lens then it converges the rays into one point, and if a piece of paper is kept at that position, then it can also burn the piece of paper. But we can’t use a concave lens because it is a diverging lens.
The correct statement would be that a convex lens can converge the rays coming from Sun and burn a piece of paper.
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