The Einstein's photoelectric equation K.Emax=hf - hfo is valid for:
Correct answer: B. The electrons coming out of the metal surface with full surplus energy (without losing any energy during collisions with the atoms of metal)
- A. The electrons coming out of the metal surface with minimum energy
- B. The electrons coming out of the metal surface with full surplus energy (without losing any energy during collisions with the atoms of metal)
- C. The photons of light that reflect back from the metal surface
- D. All the electrons that come out of the metal surface
Explanation
If the energy of the photon is greater than the work function, then a part of it is used in escaping an electron from the metal surface. The remaining energy is taken up by electron as its kinetic energy. Energy of photon = work function + Max. K.E. of photoelectrons hf= Φ + K.E.max K.E.max = hf - Φ = hf - hfo
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 photoelectric threshold frequency depends upon:
Frequency below which no electrons are emitted from metal surface is:
Maximum kinetic energy of photoelectron is_frequency of incident radiation.
A device whose working is based upon photoelectric effect is:
The curve between photoelectric current (I) and frequency (f) is
The reverse process of photo electric effect is