Solved UPSC CDS/OTA Question
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Q · Optics-Refraction of LightMedium · 45s
A light ray passes from glass (μ = 1.5) into air (μ = 1). How does its speed and wavelength change?
TopicOptics-Refraction of Light
Question Typemultiple choice
DifficultyMedium
Marking+1 / −0.33
Test Duration30 min
Step-by-Step Solution
The complete worked solution.
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When light moves from a denser to a rarer medium, its speed and wavelength both increase, but frequency remains unchanged.
Final Answer: Option A - Speed increases, wavelength increases