If frequency of incident light is increased beyond threshold frequency, keeping light intensity constant, then:
Correct answer: A. Stopping potential increases
- A. Stopping potential increases
- B. Stopping potential decreases
- C. Stopping potential remains constant
- D. Stopping potential becomes infinite
Explanation
The stopping potential is the voltage required to completely stop photoelectrons. The energy of the electrons are directly related with the magnitude of the stopping potential. The greater the frequency of the incident photon, the higher the energy of the electron and the higher will be the stopping potential.
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About Dawn of Modern Physics
Classical physics cannot explain blackbody radiation and related observations, leading to Planck’s quantum theory, in which energy is emitted or absorbed in discrete packets. Photons provide the particle model of light, with energy and momentum linked to frequency and wavelength, including the photoelectric effect and its threshold frequency.
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