Question

a paraxial ray incident on the concave mirror passes through _____ after reflection​

Answer 1

Answer:

A ray incident parallel to principal axis on a concave mirror at an angle θ after two reflection, reflected ray becomes parallel to incident ray. If θ=

N

π

( in radian) then fine the value of N.

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Answer 2

a parallel ray incident on the concave mirror passes through_focus_____

Explanation:

after reflect ion