The number of photoelectrons emitted per second from the metal surface depends upon
Correct answer: A. Intensity of light
- A. Intensity of light
- B. Frequency of light
- C. Wavelength of light
- D. Speed of light
Explanation
According to Planck's quantum theory, the intensity of the incident beam is directly related to the number of photons in the beam. If the intensity of the beam increases, the number of photons will also increase. As the number of photons incident on the metal surface increases, the number of photoelectrons emitted from the metal will also increase.
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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