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Question
A beam of light is incident through the holes on side A and emerges out of the holes on the other face of the box as shown in the Figure. Which of the following could be inside the box?
Options
Concave lens
Rectangular glass slab
Prism
Convex lens
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Solution
Convex lens
Explanation -
In the given situation, the parallel rays are converged at a point. It is possible only in the case of convex lens.
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