In the mathematical relationship Φ = hv, the symbol Φ represents:
Correct answer: C. Work function
- A. Magnetic flux
- B. Threshold frequency
- C. Work function
- D. Electric flux
- E. Wave function
Explanation
The symbol Φ in the equation Φ = hv represents the work function, which is the minimum energy required to remove an electron from the surface of a material. In the context of the photoelectric effect, this energy is provided by photons with energy hv, where h is Planck's constant and v is the frequency of the photon. The other options are incorrect as they pertain to different physical concepts: magnetic flux and electric flux relate to field lines through a surface, threshold frequency is the minimum frequency for the photoelectric effect but not represented by Φ, and the wave function is a concept from quantum mechanics describing the state of a system.
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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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