Question:
Whenever light travels from rarer medium into denser medium its
Whenever light travels from rarer medium into denser medium its
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When light passes from a rarer to a denser medium, its wavelength decreases, but the frequency remains constant.
Updated On: Apr 7, 2026
- frequency increases
- wavelength increases
- frequency decreases
- wavelength decreases
- wavelength remains unchanged
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The Correct Option is D
Solution and Explanation
When light travels from a rarer medium to a denser medium, its speed decreases. Since the frequency of light remains constant when it enters a new medium, its wavelength decreases.
The relationship between the speed \( v \), frequency \( f \), and wavelength \( \lambda \) is given by: \[ v = f \lambda \]
Since the frequency remains constant and the speed decreases in a denser medium, the wavelength must decrease.
Hence, the correct answer is (D).
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