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Ray Optics and Optical Instruments — Physics STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 SciencePhysicsRay Optics and Optical Instruments2 Marks
Question
How will an air bubble behave like a lens in water?
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Answer

Both the surfaces of the air bubble are convex. Hence this behaves like a convex lens. But the refractive index of water is greater than the refractive index of air. Therefore, due to the change in the nature of the air bubble present in the water tank, it will act like a concave lens.

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