Which statement correctly describes the relationship between a blackbody radiator, its temperature, and the electromagnetic radiation it gives off? A. As the blackbody radiator becomes warmer, it reflects different wavelengths of light. B. As the blackbody radiator becomes warmer, it emits random wavelengths of light. C. As the blackbody radiator becomes warmer, it emits light of shorter wavelengths. D. As the blackbody radiator becomes cooler, it emits light of shorter wavelengths.

Question

Which statement correctly describes the relationship between a blackbody radiator, its temperature, and the electromagnetic radiation it gives off? A. As the blackbody radiator becomes warmer, it reflects different wavelengths of light. B. As the blackbody radiator becomes warmer, it emits random wavelengths of light. C. As the blackbody radiator becomes warmer, it emits light of shorter wavelengths. D. As the blackbody radiator becomes cooler, it emits light of shorter wavelengths.

Answer 1

C. As the blackbody radiator becomes warmer, it emits light of shorter wavelengths.

Answer 2

A blackbody radiator is an idealized physical body that absorbs all incident electromagnetic radiation, regardless of wavelength or angle of incidence. According to Planck's Law and Wien's Displacement Law, as the temperature of a blackbody increases, it emits radiation with shorter wavelengths, meaning the peak wavelength shifts towards the shorter (bluer) end of the spectrum. Therefore, the correct description is that as a blackbody radiator becomes warmer, it emits light of shorter wavelengths.

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