Photon "A" has twice the energy of photon "B". What is the ratio of the momentum of "A" to that of "B"?
Correct answer: C. 2 : 1
- A. 4 : 1
- B. 1 : 2
- C. 2 : 1
- D. 1 : 4
Explanation
Since a photon's momentum comes straight from its energy (p = E/c), doubling the energy automatically doubles the momentum. So if photon A has twice the energy of photon B, its momentum is also twice as large.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
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.
Practise Dawn of Modern Physics
739 free Dawn of Modern Physics MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Physics questions like this
Physics is on 16 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Photons and the Particle Model of Light questions
Calculate the wavelength of a photon associated with 3 x 10^14 Hz frequency.
Calculate the wavelength of photons associated with 3.1 x 10^14 Hz frequency.
Which rays need a medium to travel?
For two lights of different frequencies. If f2 > f1 then:
Of the following which is the best evidence for the wave nature of matter?
Rest mass of photon is: