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A light ray in air is incident on a water (n = 1.333) surface at a 65.0° angle of incidence. Find
(a) the angle of reflection and
(b) the angle of refraction.
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A rock takes 2.1 s to hit ground when it is thrown straigh up from a cliff with initial velocity of 7.5 m/s. Calculate height of the cliff in m & length it would take to reach the ground if thrown down with same speed.
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