In a photon-particle collision, the quantity that does not remain conserved is?
Correct answer: C. Number of photons
- A. Total energy
- B. Total momentum
- C. Number of photons
- D. None of these
Explanation
In a photon - particle collision, the number of photons may not be conserved. The photon may be absorbed or a new photon may be created.
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
If K.E of free electron is doubled, its de broglie wavelength becomes?
An electric bulb of 100 Watts converts 3% electrical energy into light energy. If the wavelength of light emitted is 6625 A, the number of photons emitted in 1 s is? h= 6.625 x 10^-34 J.sec
Threshold wavelength for a metal having work function Wo is X. What is the threshold wavelength for the metal having work function 2Wo?
The momentum of a photon is 2 x 10^-16 gm-cm/sec. Its energy is:
The radio station emits 10kW power of 90.8 MHz. Find the number of photons emitted per second.
The energy of a photon is 3 x 10^-19 J. Its momentum is: