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PHY 104 PHY 104 Past Questions Objective Question
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Question

Which of the following give the correct definition of critical angle?
Options
A The critical angle is the angle of incidence when the angle of refraction is exactly 90° and light is refracted along the boundary.
Correct Answer
B The critical angle is the angle of refraction when the angle of incidence is exactly 90° and light is refracted along the boundary.
C The critical angle is the angle of incidence when the angle of refraction is exactly 90° and light is refracted along the boundary.
D The critical angle is the angle of refraction when the angle of incidence is exactly 90° and light is refracted along the boundary.
Correct Answer

Option A is the correct answer.

Detailed Explanation

The critical angle is defined as the angle of incidence in the denser medium for which the angle of refraction in the rarer medium is 90°. At this angle, the refracted ray travels along the boundary between the two media.

Hint

The critical angle is an angle of incidence, not refraction.

Question Info

Course: PHY 104
Topic: PHY 104 Past Questions
Type: Objective
Difficulty: Not specified
Question 794 of 947
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