A ray of light passes from a medium A to another medium B. No bending of light occurs if the ray of light hits the boundary of medium B at an angle of

(a) 0?

(b) 45"

(c) 90?

Dear Student, 
The ray of light hits the boundary of medium B at an angle of 90° (option c).
If a ray of light travels along the normal, it will not get refracted, else it will go straight making an angle of 90° with the boundary of medium B.

Regards
 

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(C) 90 ?
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