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A ray of light travelling in air enters obliquely into water. Does the light ray bends towards the normal or away from the normal? Why?
 
The light ray bends .
 
When a light ray travels from a medium with low refractive index ( medium) to a medium with high refractive index ( medium), its speed  and bends .
 
As water is optically  than air, a ray of light entering from air into water will bend .