When an electron releases energy and jumps from higher to lower energy state, it is called:
Correct answer: A. De-excitation
- A. De-excitation
- B. Photoelectric effect
- C. Excitation
- D. Ionization
Explanation
De-excitation is the transition of electrons from higher to lower energy states, with the release of energy as photons. Excitation, on the other hand, is the transition from lower to higher states when an electron absorbs energy. Ionization is the complete loss of an electron when it has absorbed energy equal to its ionization energy, forming a cation. The photoelectric effect is the release of electrons from a material when electromagnetic radiations are incident on it.
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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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