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An air bubble is contained inside water . It behave as a (a) concave lens or (b) convex lens . Why?

An air bubble is contained inside water . It behave as a (a) concave lens  or (b) convex lens . Why?

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Grade:12th pass

1 Answers

Arun
25758 Points
3 years ago
Dear Manisha

Since air is optically rarer than water, the ray of light bends away from the normal at the point of incidence when moving from water to air while it bends towards the normal while moving from air to water. The normal at any point of a spherical bubble will pass through the center of the bubble.
It is clearly visible that the air bubble acts as a DIVERGING LENS (concave lens) in water.

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