A converging lens of focal length f is placed just above a water surfa

1.	A converging lens of focal length f is placed just above a water surface, parallel to the surface, without touching it. A point source, S, of light is placed inside the water, vertically below the lens, at a depth f from it. This arrangement will produce (a) a parallel beam of light emerging from the lens (b) a real image of S in air (c) a virtual image of S in water (d) a virtual image of S in air
Answer» Correct Answer is: (c) a virtual image of S in water As seen from the lens, S is at a distance less than f from the lens.

A converging lens of focal length f is placed just above a water surface, parallel to the surface, without touching it. A point source, S, of light is placed inside the water, vertically below the lens, at a depth f from it. This arrangement will produce (a) a parallel beam of light emerging from the lens (b) a real image of S in air (c) a virtual image of S in water (d) a virtual image of S in air

Answer»

Correct Answer is: (c) a virtual image of S in water

As seen from the lens, S is at a distance less than f from the lens.

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