A lemon kept in water in a glass tumbler appears to be larger than its

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A lemon kept in water in a glass tumbler appears to be larger than its actual size. It is because of

reflection of light
scattering of light
refraction of light
polarization of light
This question was previously asked in
UPSC NDA-2 – 2020
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The correct answer is (C) refraction of light. When light passes from one medium (water) to another (air), it bends. This bending of light is called refraction.
Refraction is the phenomenon of bending of light as it passes from one optical medium to another with different optical density.
The apparent magnification of the lemon under water is due to the refractive indices of water, glass, and air. The light rays from the part of the lemon submerged in water bend away from the normal when they exit the water into the air, making the lemon appear larger and closer than it is.

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