9.5 A small bulb is placed at the bottom of a tank containing water to a depth of 80 cm

PHYSICS · Subjective · CBSE · Physics · Ray Optics and Optical Instruments · Ray Optics and Optical Instruments

Problem

9.5 A small bulb is placed at the bottom of a tank containing water to a depth of 80 cm . What is the area of the surface of water through which light from the bulb can emerge out? Refractive index of water is 1.33 . (Consider the bulb to be a point source.)

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