Photon A has twice the energy of photon B. What is the ratio of the momentum of A to that of B?
Correct answer: B. 2:1
- A. 4:1
- B. 2:1
- C. 1:1
- D. 1:2
Explanation
The momentum ( P ) of a photon is directly proportional to its energy ( E ), as given by the equation P = E.c where ( c ) is the speed of light.Since Photon A has twice the energy of Photon B ( EA = 2EB ), their momentum will also have the same ratio:Therefore, the ratio of the momentum of Photon A to that of Photon B is ( PA : PB = 2:1 ).
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About Photons and the Particle Model of Light
The particle model treats light as photons with energy E equals hf and momentum related to wavelength. Questions involve the photoelectric effect, work function, threshold frequency, stopping potential and photon energy, while distinguishing particle behaviour from the wave description of interference and diffraction.
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