The rest mass of photon is:
Correct answer: B. Zero
- A. Infinite
- B. Zero
- C. 1.6 x 10^-27 kg
- D. 3 x 10^8 kg
Explanation
The rest mass of a photon is 0. This is because photons are particles of light and they always move at the speed of light in a vacuum. According to the theory of relativity, any particle that moves at the speed of light must have zero rest mass. Therefore, the rest mass of a photon is 0.m0 =0where (m0) is the rest mass of the photon.
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
The maximum kinetic energy of emitted photoelectrons, from different metal surfaces, depends upon:
Which phenomenon does NOT verify particle nature of light?
Which particle has the shortest wavelength, if all are Having the same velocity?
The minimum energy required by a photon to create an electron-positron pair is:
The maximum Compton shift is at?
The energy of a photon (λ = 589nm) equals the band gap of a semiconducting material. The minimum energy required to create a hole-electron pair is: