Question

The characteristics of Planck's black body radiation distribution is given in the options. Which of the following is NOT a characteristic of Planck's black body radiation distribution?

• A. As temperature increases, peak of the curve shifts towards higher wavelength
• B. Spectral emissive power varies continuously with change in wavelength
• C. At a given wavelength, as temperature increases, emissive power also increases
• D. Total emissive power is proportional to \( T^4 \)

Hint:

As temperature increases, a black body emits more radiation and the peak shifts to shorter wavelengths, according to Wien's Displacement Law.

Answer 1

The Correct Option is A

According to Planck's law, as the temperature increases, the peak of the black body radiation curve shifts towards shorter wavelengths (Wien's Displacement Law), not towards higher wavelengths. Option (a) is incorrect.