CUET · PHYSICS · PYQ PAPER 2025
When light travels from one medium to another, then its
- A frequency changes but wavelength remains the same
- B wavelength changes but frequency remains the same
- C both frequency and wavelength remain unchanged
- D both frequency and wavelength change
Answer & Solution
Correct Answer
(B) wavelength changes but frequency remains the same
Step-by-step Solution
Detailed explanation
When light enters a new medium, its speed changes due to the change in optical density. Since frequency is determined solely by the source of the light, it remains constant, causing the wavelength to change proportionally with the speed to satisfy the equation: \(v=f \lambda\)…
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