Black body is considered ideal when it _.
Correct answer: C. Both Options A and B are correct
- A. Emits all radiation
- B. Absorbs all radiation
- C. Both Options A and B are correct
- D. None of these options are correct
Explanation
An ideal black body is a perfect absorber as well as perfect emitter of electromagnetic radiation. Hence, Option C is correct.
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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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