The momentum of a photon is p. The frequency associated with it is given by?
Correct answer: A. pc/h
- A. pc/h
- B. hc/p
- C. ph/c
- D. h/pc
Explanation
The momentum of a photon is given by p = E/c, where E is the energy of the photon and c is the speed of light. The energy of a photon is related to its frequency (f) by the equation E = hf, where h is Planck's constant. Substituting the expression for energy into the momentum equation, we have: p = (hf)/c Rearranging the equation, we get: f = p*c/h Therefore, the frequency associated with a photon is given by: f = pc/h So, the correct option is: A) pc/h - The frequency associated with a photon is given by pc/h.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Dawn of Modern Physics
Classical physics cannot explain blackbody radiation and related observations, leading to Planck’s quantum theory, in which energy is emitted or absorbed in discrete packets. Photons provide the particle model of light, with energy and momentum linked to frequency and wavelength, including the photoelectric effect and its threshold frequency.
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 Dawn of Modern Physics questions
The mass of a photon at rest is:
The energy of a photon is 3 x 10^-19 J. Its momentum is:
The radio station emits 10kW power of 90.8 MHz. Find the number of photons emitted per second.
Photon A has twice the energy of Photon B. What is the ratio of momentum of A as to that of B?
The value of Planck's constant 'h' can be expressed as? The value of plank's constant 'h' can be expressed as?t 'h' can be expressed as?
Let nr and nb be respectively the number of photons emitted by a red bulb and blue bulb of equal power in a given time. Then: