Question

7. If the critical angle for a medium is 45°, its refractive index will be
a.1
b . 1.5
c. 1.414
d. 2​

Answer 1

Answer:

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Answer 2

Answer:

c. 1.414

Explanation:

Since the refractive index and critical angle are related as

n =1/ sin c

Where n is refractive index and c is critical angle.

c = 45°

sin c  = 1 / n

sin 45° = 1 / n

1 / √2 = 1 / n

n =  √2

n = 1.414