Question 1:
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?
Answer:
The light ray bends towards the normal.
When a ray of light travels from an optically rarer medium to an optically denser
medium, it gets bent towards the normal. Since water is optically denser than air,
a ray of light travelling from air into the water will bend towards the normal.
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