Photon Momentum
Easyphysics
Photon momentum p (wavelength λ) is:
Select the correct option:
Solution
Incorrect! Answer:
h/λ
Photons have zero rest mass, but they possess momentum and energy.
- E=hf
- E=pc Equating the two: pc=hf⟹p=chf=λh. This confirms that radiation carries momentum and can exert pressure (Radiation Pressure) when it hits a surface.
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About This Question
- Subject
- physics
- Chapter
- dual nature of radiation and matter
- Topic
- photon momentum
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
h/λ
Photons have zero rest mass, but they possess momentum and energy.
- E=hf
- E=pc Equating the two: pc=hf⟹p=chf=λh. This confirms that radiation carries momentum and can exert pressure (Radiation Pressure) when it hits a surface.
This easy difficulty physics question is from the chapter dual nature of radiation and matter, covering the topic of photon momentum. It appeared in the 2025 exam.
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