For a stationary concave mirror, an object approaches at 2 cm/s and its real image recedes at 18 cm/s. If their separation is 40 cm, find the image distance in centimetres.
For a stationary concave mirror, an object approaches at 2 cm/s and its real image recedes at 18 cm/s. If their separation is 40 cm, find the image distance in centimetres.