When a ray of light of wavelength and frequency is refracted into a denser medium:
- (A) and both increase
- (B) increases but is unchanged
- (C) decreases but is unchanged✓ Correct
- (D) and both decrease
Answer: (C)
Solution
On entering a denser medium the speed falls. Frequency is set by the source and does not change, so from the wavelength \emph{decreases} while stays the same.
CBSE Class 12 Board · 2024 · Single correct option