The maximum KE of an emmitted photoelectrons depends on:
Correct answer: B. Frequency of the incident light
- A. Intensity of the incident light
- B. Frequency of the incident light
- C. Temperature of the photosensitive surface
- D. None of the above
Explanation
The maximum KE of emitted photoelectrons depends on the frequency of incident lightThis can be represented by the photoelectric equationEk = hf + wWhere Ek is the maximum kinetic energy of emitted photoelectrons, h is the Planck's constant, f is the frequency of incident light and w is the work functionFor a given material, w remains constant, so the maximum kinetic energy is dependent on the frequency.
This question appeared on the ETEA MDCAT 2006 paper, which you can sit online with every answer explained.
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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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