Photon Momentum
Mediumphysics
Photon momentum p equals?
Select the correct option:
Solution
Incorrect! Answer:
h/λ
- Energy Formulas: E=hf (Quantum) and E=pc (Relativistic for m=0).
- Combine: pc=hf.
- Rearrange: p=chf.
- Wave Relation: Substitute f/c=1/λ.
- Result: p=λh.
- Significance: Despite having zero rest mass, photons carry momentum and can exert radiation pressure.
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About This Question
- Subject
- physics
- Chapter
- dual nature
- Topic
- photon momentum
- Difficulty
- Medium
- Year
- 2025
Solution
Correct Answer:
h/λ
- Energy Formulas: E=hf (Quantum) and E=pc (Relativistic for m=0).
- Combine: pc=hf.
- Rearrange: p=chf.
- Wave Relation: Substitute f/c=1/λ.
- Result: p=λh.
- Significance: Despite having zero rest mass, photons carry momentum and can exert radiation pressure.
This medium difficulty physics question is from the chapter dual nature, covering the topic of photon momentum. It appeared in the 2025 exam.
Looking for more practice? Explore all physics questions or browse dual nature questions on RankGuru.