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Question
The angle of incidence for which the angle of refraction is X is called the critical angle. Then X equals ______.
Options
90°
60°
45°
30°
MCQ
Fill in the Blanks
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Solution
The angle of incidence for which the angle of refraction is X is called the critical angle. Then X equals 90°.
Explanation:
By definition, the critical angle is the angle of incidence in the denser medium for which the corresponding angle of refraction in the rarer medium is 90°.
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