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Question

A ray of light passes undeviated after refraction from a thin convex lens when the ray is incident at __.


A

focus

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B

centre of curvature

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C

optical centre

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D

parallel to principal axis

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Solution

The correct option is C

optical centre


If a ray of light is incident on focus, it will become parallel to the principal axis after refraction

If rays are coming parallel to principal axis, it will pass through focus. After refraction.

If rays are incident at centre of curvature, then it will deriate after refraction


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