Rdiations are always emitted or absorbed in the form of packets of energy. This is the statement of:
Correct answer: D. Planck's quantum law
- A. Rayleigh-Jean's law
- B. Wein's displacement law
- C. Stefan's law
- D. Planck's quantum law
Explanation
The statement that "radiations are always emitted or absorbed in the form of packets of energy" is a fundamental principle of quantum mechanics and is known as the quantization of energy. This concept was introduced by Max Planck in 1900 when he proposed that energy is quantized and exists in discrete packets or "quanta." This idea was a crucial element in explaining the behavior of blackbody radiation and laid the groundwork for the development of quantum theory.
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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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