Question

Assertion : For higher temperatures the peak emission wavelength of a black body shifts to lower wavelengths.

Reason : Peak emission wavelengths of a black body is proportional to the fourth-power of temperature

(a) Both A and R are true and R is the correct explanation of A

(b) Both A and R are true but R is not correct explanation of A

(c) A is true but R is false

(d) A and R are false

Answer 1

Correct option (c) A is true but R is false

Explanation :

Wien's relation gives λ at maximum intensity λ_mT = constant.

Stefan's law, rate of emission of energy per unit area = σT⁴. Intensity of emission of a particular wavelength does not explains the shift of λ_m with absolute temperature.