Work function was given by:
Correct answer: C. Einstein
- A. Newton
- B. Heisenberg
- C. Einstein
- D. Bohr
Explanation
Work function is the minimum energy required to cause the photoelectric effect. It is constant for a particular material. Absorption of energy equal to the work function causes electrons to be excited enough to come up to the surface of the material. Surplus energy will cause the emission of the electron from the surface. This can be explained from the Photoelectric Effect equation discovered by Einstein: KEmax = hfo + hf (where KEmax is the energy of the incident photon, hfo is the work function, hf is the KE of the electron)
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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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