Question

For normal incidence on a plane mirror identify which of these statements are true --
(I) Both the angles of incidence and reflection are 0 degree .
(II) Both the angles of incidence and reflection are 90 degree .
(III) The angles that both the incident ray and the reflected ray make with the mirror surface are 0 degree .
(IV) The angles that both the incident ray and the reflected ray make with the mirror surface are 90 degree .​

Answer 1

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option 4

(IV) The angles that both the incident ray and the reflected ray make with the mirror surface are 90 degree .