Black body is an ideal radiator that radiates ................. at all wavelengths.
Correct answer: C. Equally
- A. Inconsistently
- B. Distinctly
- C. Equally
- D. Unequally
Explanation
While a black body emits radiation across all wavelengths, the distribution of that radiation is not equal in intensity; it follows a specific curve that peaks at a wavelength determined by the body's temperature
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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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