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प्रश्न
A beam of parallel light rays is incident through the holes on one side of a box and emerges out through the holes on its opposite side as shown in the diagram below:
Which of the following could be inside the box?
पर्याय
a rectangular glass block
a concave lens
a convex lens
a glass prism
MCQ
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उत्तर
A concave lens
Explanation:
The diagram shows that parallel light rays enter the box and converge to meet at a single point after emerging. A convex lens is a converging lens that bends parallel incident rays inward toward a common focal point. The other options either cause lateral displacement, divergence, or dispersion rather than focusing parallel rays to a point.
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