Radiations emitted by human body lie in which of the following series?
Correct answer: D. None of these
- A. Bracket
- B. Pfund
- C. Paschen
- D. None of these
Explanation
The radiation emitted by the human body is in the form of thermal radiations. This thermal radiation is a continuous spectrum in the infrared region and does not emit the discrete spectral lines of atomic transitions like the series given in the options. The energy levels involved in thermal radiation from the human body are associated with the temperature of the body rather than electronic transitions within atoms. So, the answer is none of these.
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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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