Solved UPSC CDS/OTA Question
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Q · Optics-Refraction of LightMedium · 45s
If the angle of incidence is equal to the critical angle, then the angle of refraction is:
TopicOptics-Refraction of Light
Question Typemultiple choice
DifficultyMedium
Marking+1 / −0.33
Test Duration30 min
Step-by-Step Solution
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At the critical angle, the angle of refraction in the rarer medium is 90°.
Final Answer: Option C - 90°