A ray of light traveling in the air enters obliquely into water. Does the light ray bend towards the normal or away from the normal? Why?
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Trace the path of the refracted ray
In this case, the ray bends towards the normal.
When the ray of light travels from an optically rarer medium to an optically denser medium its speed slows down and the refracted ray gets bends towards the normal but if it moves from an optically denser medium to an optically rarer medium it bends away from the normal.