CUET · PHYSICS · PYQ PAPER 2023
When a ray of light enters a glass slab from air :
- A its wavelength decreases
- B its wavelength increases
- C its frequency increases
- D neither its wavelength nor its frequency changes
Answer & Solution
Correct Answer
(A) its wavelength decreases
Step-by-step Solution
Detailed explanation
Wavelength \(\lambda\) decreases because frequency \(f\) remains constant and speed \(v\) decreases (\(v = f\lambda\)).
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