A ray of light travelling in air enters obliquely into
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A ray of light travelling in air enters obliquely into water. Does the ray of light bend towards the normal or away from the normal? Why?
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SOLUTION
When a ray of light travelling in air enters obliquely into water, it bends towards the normal. This is because water is optically denser than air. On entering water, the speed of light decreases and the light bends towards normal.