A prism has refracting angle of 300 and it is made of glass of refractive index 2 . At what angle should a light ray be incident on a face of prism such that it passes normally through the other face?

For normal emergence r = A From Snell's Law sin ? i sin ? r = μ 1 ? sin ? i = 2 sin ? 30 0 ? i = 45 0

A prism has refracting angle of 30⁰ and it is made of glass of refractive index $\sqrt[]{2}$ . At what angle should a light ray be incident on a face of prism such that it passes normally through the other face?

Option 1 - 300

Option 2 - 600

Option 3 - 450

Option 4 - 900

2 Views|Posted 4 months ago

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Answered by

Alok Kumar Singh | Contributor-Level 10

4 months ago

Correct Option - 3

Detailed Solution:

For normal emergence

$r = A$

From Snell's Law

$\frac{\sin ? i}{\sin ? r} = \frac{μ}{1}$

$? \sin ? i = \sqrt[]{2} \sin ? 30^{0}$

$? i = 45^{0}$

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