The black body always _ radiations.
Correct answer: C. Both Options A and B are correct
- A. Emits
- B. Absorbs
- C. Both Options A and B are correct
- D. Reflects
Explanation
A black body absorbs all radiation incident upon it, regardless of wavelength or frequency. This absorption is a fundamental property of black bodies, as they are ideal absorbers of electromagnetic radiation. A black body, by definition, emits radiation across the entire electromagnetic spectrum. This emission is due to the thermal energy possessed by the black body, and it follows the principles of black-body radiation, as described by Planck's law and Stefan-Boltzmann's law.
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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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