Frequency remains unchanged.
Class 12 Physics
Chapter 9 Ray Optics and Optical Instruments Session 2024-2025.
If a ray of light propagates from a rarer to a denser medium, how does its frequency change?
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When a ray of light propagates from a rarer to a denser medium, its frequency remains unchanged. Frequency depends only on the source of light and is unaffected by the medium of propagation.
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