An air bubble in water ( = 4 3 ) is shown in figure. The apparent depth of the image of the bubble in plane mirror viewed by observer is.

Step-by-step solution

The refractive index of water, = 4 3 The real depth of image of bubble from the surface of water, d=24+8=32 ~cm Apparent depth of the image of bubble is d^ = d = 32 4 / 3 =24 ~cm