Which theory explains that energy exchange takes place in discrete "bundles" or "quanta"?
Correct answer: B. Quantum theory
- A. Special theory of relativity
- B. Quantum theory
- C. Corpuscular theory
- D. Bohr's theory
Explanation
The theory that explains that energy exchange takes place in discrete "bundles" or "quanta" is quantum theory. This concept was first introduced by Max Planck in 1900 when he proposed that energy is quantized and exists in discrete packets. Subsequently, quantum theory was further developed by scientists like Albert Einstein, Niels Bohr, Werner Heisenberg, and Erwin Schrödinger, leading to the establishment of quantum mechanics. In quantum mechanics, the behavior of particles, including energy exchanges, is described in terms of discrete units or quanta.
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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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