The peak wavelength of radiation emitted by a black body at a temperature of 2000 K is 1.45 µm

Q. The peak wavelength of radiation emitted by a black body at a temperature of 2000 K is 1.45 µm. If the peak wavelength of emitted radiation changes to 2.90 µm, then the temperature (in K) of the black body is

(A) 500                       (B) 1000                     (C) 4000                    (D) 8000

Ans: 1000