Two photons of energy 2.5 eV each are incident on a metal plate whose work function is 4.0 eV, then the number of electrons emitted from the metal surface will be.
Correct answer: D. Electron emission is not possible
- A. One
- B. More than two
- C. Two
- D. Electron emission is not possible
Explanation
Here incident energy of photon < work function So, the photoelectric effect will not start.
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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.
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