The maximum kinetic energy of emitted photoelectrons, from different metal surfaces, depends upon:
Correct answer: D. Both frequency of incident light and nature of metal surface
- A. Intensity of incident light only
- B. Frequency of the incident light only
- C. Nature of metal surface
- D. Both frequency of incident light and nature of metal surface
Explanation
The maximum kinetic energy of emitted photoelectrons depends on both the frequency of the incident light and the nature of the metal surface. As: K.Emax = hf-Φwhere,h= Plank's connstantf= frequencyΦ= work function (different metals has different work function so K.Emax also depend on metal nature)This means that the photoelectron's kinetic energy is the energy supplied by the photon, minus the energy used to overcome the work function.
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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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