Solved UPSC CDS/OTA Question
A solved UPSC CDS/OTA PYQ - decoded step-by-step.
Solve it the standard way once - then learn the shortcut.
Q · Optics-Refraction of LightMedium · 45s
When refraction occurs, which of these changes? 1. Speed 2. Wavelength 3. Frequency 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.
Only speed and wavelength change; frequency stays the same.
Final Answer: Option B - 1 and 2 only