![A ray of light passes from a medium X to another medium Y.](https://www.gkseries.com/blog/wp-content/uploads/2022/05/A-ray-of-light-passes-from-a-medium-X-to-another-medium-Y..png)
Q. A ray of light passes from a medium X to another medium Y. No refraction of light occurs if the ray of light hits the boundary of medium Y at an angle of:
A. 120o
B. 90o
C. 45o
D. 0o
Answer: 90o
A. 120o
B. 90o
C. 45o
D. 0o
Answer: 90o
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