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Recent questions tagged telegram-1618
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(chatquestion)...The diameter of aperture of a plano-convex lens is 6 cm and its maximum thickness is 3 mm. If the velocity of light in the material of the lens is 2x 108 m/s, its focal length is (approximately) (2) 15 cm (1) 10 cm (4) 60 cm (3) 30 cm
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telegram-1618
asked
Jan 22, 2020
by
balaji.thirumalai
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