

The image of P will be formed at a distance h below the mirror.
Apparent depth of P is x1 = [(d – h) / n]
Apparent depth of P is x2 = [(d + h) / n]
Apparent distance between P and its image = x2 – x1 = [(d + h) / n] – [(d – h) / n] = [(d + h – d + h) / n] = (2h / n).
