The stopping potential depends on
Correct answer: C. Both a and b
- A. Intensity of incident light
- B. Frequency of incident light
- C. Both a and b
- D. None of these
Explanation
The stopping potential does depend on both the intensity and frequency of the incident light.Here's why:Frequency: The frequency of the incident light determines the energy of the photons. Higher frequency photons have more energy, which leads to photoelectrons with higher kinetic energy. As a result, a higher stopping potential is required to stop these electrons.Intensity: While the intensity of light doesn't affect the energy of individual photons, it does affect the number of photons hitting the metal surface. Higher intensity means more photons, which in turn means more photoelectrons emitted. This increased current due to more electrons requires a higher stopping potential to completely stop the flow.
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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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