Question

what is the deviation of the light rays passing through the light center?​

Answer 1

Explanation:

the small scale, that middle portion of convex or concave lens acts like window glass and light passes through at same incident angle and so it does not deviate from its path (except for slight lateral shifting). So deviation will be zero at the optical center of lens.

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Answer 2

Explanation:

what is the deviation produced in ray passing through optical centre of the lens ? Solution : Zero degree.