A double convex air bubble in water will act like a

1. convex lens

2. concave lens

3. plane slab

4. concave mirror

please explain the answer.

1. Concave lens.

As light travels from water to air , due to increase of speed, the light rays will bend away from normal and hence, the air bubble will act like a diverging or concave lens!!

Hope this helps!

  • -4

That answer is wrong!The correct answer is

1. Convex lens

Diverging lens and for, large angle of incidences, it will act as a convex mirror due to total internal reflection.

  • -1
We have to first observe the bubbles image which is hollow from interior portion .We are greatly aware of empty space has presence of air so at both interface of bubble light will deviate away from Normal and finally act like double concave lens.
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