Solved UPSC CDS/OTA Question
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Q · Optics-Refraction of LightMedium · 45s
Which of the following devices uses total internal reflection? 1. Optical fibre 2. Binoculars 3. Diamonds sparkle Select the correct answer:
TopicOptics-Refraction of Light
Question Typemultiple choice
DifficultyMedium
Marking+1 / −0.33
Test Duration30 min
Step-by-Step Solution
The complete worked solution.
Every step explained - no skipped algebra.
Optical fibres, binocular prisms, and diamonds all rely on total internal reflection.
Final Answer: Option D - 1, 2 and 3