Question:
When light is reflected from an optically rarer medium:
When light is reflected from an optically rarer medium:
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For light reflected from a rarer medium, the phase changes by \( \pi \), but the frequency of the light remains the same.
Updated On: Apr 7, 2026
- its phase remains unchanged but its frequency increases
- both its phase and frequency remain unchanged
- its phase changes by \( \pi \) but the frequency remains unchanged
- its phase remains the same but the frequency decreases
- its phase changes by \( \frac{\pi}{2} \) but the frequency remains unchanged
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The Correct Option is B
Solution and Explanation
Step 1: When light is reflected from an optically rarer medium, the frequency of the light remains unchanged, as the frequency of light does not depend on the medium.
Step 2: However, the phase of the light changes by \( \pi \), as the reflection from a rarer medium results in a phase shift of \( \pi \).
Step 3: Thus, both the phase and frequency of the light remain unchanged in the reflected wave.
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