The relation, hf= 2m0c2 + KEe- + KEe+,holds a:
Correct answer: A. Pair production
- A. Pair production
- B. Compton effect
- C. Photoelectric effect
- D. Photo cell
Explanation
The given relation holds during the pair production process, where a high-energy photon is converted into an electron-positron pair. After this process, if the electron and positron annihilate each other, the total energy is still conserved.
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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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