Minimum frequency below which no electrons are emitted from the metal surface is called _ frequency.
Correct answer: D. Threshold
- A. Minimum
- B. Angular
- C. Maximum
- D. Threshold
Explanation
The correct answer is the 'threshold frequency', which is the minimum frequency of electromagnetic radiation necessary to dislodge electrons from the surface of a metal. This concept is fundamental to the photoelectric effect, where no electrons are emitted if the incident light's frequency is below this threshold, regardless of its intensity. The other options, 'minimum', 'angular', and 'maximum', either lack specificity or pertain to different contexts within physics.
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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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