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
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