A plane mirror reflects a beam of light to form a real image. The incident beam is :-
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Question

A plane mirror reflects a beam of light to form a real image. The incident beam is :-

G1 Physics · Accepted Answer

Derived solution: Step 1: Use the law of reflection i = r and plane-mirror symmetry. The image is as far behind the mirror as the object is in front; rotation of a mirror by φ rotates the reflected ray by 2φ. Step 2: Substitute the values given in the question and apply the geometry/sign convention shown. Step 3: On simplification the result is convergent. Therefore the correct option is B.