Question:
Complete the following: When a ray of light passes from a denser to a rarer medium, its wavelength __________.
Complete the following: When a ray of light passes from a denser to a rarer medium, its wavelength __________.
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Frequency is the "DNA" of a wave; it never changes when the medium changes. Speed and wavelength change together. Denser to Rarer: Speed and Wavelength both INcrease.
Updated On: Mar 10, 2026
- decreases
- increases
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The Correct Option is B
Solution and Explanation
When a wave, including light, passes from one medium to another, its frequency remains constant. The speed of light is greater in a rarer medium than in a denser medium. The relationship between speed (\(v\)), frequency (\(f\)), and wavelength (\(\lambda\)) is \(v = f\lambda\). Since \(f\) is constant and \(v\) increases as light enters the rarer medium, the wavelength (\(\lambda\)) must also increase to maintain the equality.
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