A good absorber of heat radiation would be:
Correct answer: B. Black wool blanket
- A. A white towel
- B. Black wool blanket
- C. A polished plate
- D. None of the above
Explanation
A good absorber of heat radiation is typically a material that appears dark and has a high emissivity. Emissivity is a measure of how efficiently a material emits thermal radiation. Dark, matte surfaces tend to be better absorbers and emitters of heat radiation.
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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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