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Question

If a ray passing through the focus gets refracted by a convex lens, where will it intersect the principal axis?


A

At focus on the other side.

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B

At the pole of the lens.

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C

At double the focal length on the other side.

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D

Does not intersect at all.

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Solution

The correct option is D

Does not intersect at all.


For a convex lens, a light ray passing parallel to the principal axis converge at focus. Applying the principle of reversibility, the light ray passing through the focus will take a path parallel to the principal axis after getting refracted by a convex lens.


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