Snell's Law
Snell's law for refraction is n1 sinθ1 = n2 sinθ2. It arises from conservation of?
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About This Question
- Subject
- physics
- Chapter
- optics
- Topic
- snell's law
- Difficulty
- Medium
- Year
- 2025
Solution
Correct Answer:
Frequency
- Refraction Physics: When light travels from one medium to another, its speed and wavelength change.
- Invariance of Frequency: The frequency of a wave is determined by the source and does not change when the wave passes through different media (f1=f2).
- Snell's Law Derivation: Since v=fλ, and n=c/v, we can relate the indices and angles. The continuity of the phase at the boundary requires the 'matching' of wave vectors.
- Key Relationship: n1sinθ1=n2sinθ2 effectively ensures that the periodic oscillations stay in sync across the interface.
- Conclusion: The phenomenon is consistent with the conservation of frequency (and the overall energy of the photon E=hf).
This medium difficulty physics question is from the chapter optics, covering the topic of snell's law. It appeared in the 2025 exam.
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