An object of height h = 5 cm is located at a distance a = 12 cm from a concave mirror with focal length 10 cm. Find the height of the image :-
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Question

An object of height h = 5 cm is located at a distance a = 12 cm from a concave mirror with focal length 10 cm. Find the height of the image :-

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 25 cm. Therefore the correct option is D.