A man, whose height is 1.75 m is standing at a distance 6 m from a vertical pillar of height h = 7 m. At what distance from the man should we put a small flat mirror on the ground horizontally to see in it the image of the top of the pillar ?
Options

Question

A man, whose height is 1.75 m is standing at a distance 6 m from a vertical pillar of height h = 7 m. At what distance from the man should we put a small flat mirror on the ground horizontally to see in it the image of the top of the pillar ?

Options

G1 Physics · Accepted Answer

Derived solution: Step 1: Apply the standard geometrical-optics ray laws and the geometry shown/given in the question. Step 2: Substitute the values given in the question and apply the geometry/sign convention shown. Step 3: On simplification the result is 1.2 m. Therefore the correct option is B.