Physics-
General
Easy
Question
A small body of mass 
slides down from the top of a hemisphere of radius 
. The surface of block and hemisphere are frictionless. The height at which the body lose contact with the surface of the sphere is
The correct answer is:
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A light ray is incident by grazing one of the face of a prism and after refraction ray does not emerge out, what should be the angle of prism while critical angle is C</em
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