An object is placed in front of a spherical mirror whose 2 times magnified image is formed on screen. Then choose CORRECT option :-
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Question

An object is placed in front of a spherical mirror whose 2 times magnified image is formed on screen. Then choose CORRECT option :-

G1 Physics · Accepted Answer

Derived solution: Step 1: Use the spherical-mirror relation 1/f = 1/v + 1/u with m = - v/u and R = 2f, following the Cartesian sign convention. Step 2: Substitute the values given in the question and apply the geometry/sign convention shown. Step 3: On simplification the result is Mirror is concave m = - 2. Therefore the correct option is B.