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Based on Wien's displacement principle, what happens to the wavelength of maximum emission as the temperature rises?

1. The peak wavelength is inversely proportional to the temperature.
2. The peak wavelength is directly proportional to the temperature.
3. The peak wavelength is proportional to the square of the temperature.
4. The peak wavelength is inversely proportional to the square of the temperature.

Correct answer: The peak wavelength is inversely proportional to the temperature.

Solution

Wien's displacement law states that the wavelength at which the intensity of radiation is maximum (λmax) is inversely proportional to the absolute temperature (T) of the black body. Hence, λmax ∝ 1/T.

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