Solved UPSC CDS/OTA Question
A solved UPSC CDS/OTA PYQ - decoded step-by-step.
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Q · Optics-Refraction of LightMedium · 45s
The refractive index of a medium is defined as:
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.
n = c/v
Where c is the speed of light in vacuum (or air), and v is the speed in the medium.
Final Answer: Option B - The speed of light in air divided by the speed of light in the medium