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A ray of light travelling in air enters ...

A ray of light travelling in air enters obliquely into water. Does the light ray bend towards the normal or away from the normal? Why?

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The ray of light bends towards the normal when a ray of light enters from an optically rarer medium (having low refractive index) its speed slows down and it bends towards the normal. Since water is optically denser than air, a ray of light entering from air into water will bend towards the normal.
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