Einstein's photoelectric equation is given by:
Correct answer: A. hf - ϕ = ½ mv2
- A. hf - ϕ = ½ mv2
- B. E = hc2
- C. E = mc2
- D. hf = ½ mv2
Explanation
Explanation:Einstein's photoelectric equation states that the maximum energy of a photoelectron is equal to the difference between the work function and the energy of the incoming photon. This option is not correct. E=hc² is the equation for the total energy of a photon, where h is Planck's constant and c is the speed of light in a vaccum.This equation is related to the theory of relativity and does not directly apply to the photoelectric effect.This equation is not valid for any physical phenomenon.
This question appeared on the UHS MDCAT 2009 paper, which you can sit online with every answer explained.
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
In photoelectric effect, removal of photons is observed at _ energies.
Cesium coated oxidised silver emits electrons for _ light.
For photons of energy greater than 1.02 MeV the probability of pair production occurrence _ as the energy increases.
In Compton Effect, the value of h/moc is given by:
For intermediate energy of radiations, the dormant process is:
The minimum frequency below which no electron is emitted from the metal surface is called: