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JEEMAIN and NEET
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Physics
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Class12
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Ray Optics and Optical Instruments
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Find angle $\theta_a$ made by light ray when it gets refracted from water to air as shown .
$(a)\;\sin ^{-1} (4/5) \\ (b)\;\sin ^{-1} (3/5) \\ (c)\;\sin ^{-1} (4/3) \\ (d)\;\sin ^{-1} (3/4) $
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