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A ray of light falls on the surface of a spherical paper weight making an angle with the normal and is refracted in the medium at an angle . The angle of deviation of the emergent ray from the direction of the incident ray is
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Correct option is B
Sum of the interior angle = exterior angletotal deviation=α-β+α-β=2α-βSimilar Questions
A convex lens is at a distance of 10 cm from a convex mirror of focal length 10 cm as shown in figure. A beam of light parallel to the principal axis is incident on the tens. After refraction through the lens, reflection at the mirror and again refraction through the lens, the final emergent beam refraces the path of the incident beam then focal length of the lens is
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