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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
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- 500
- 1000
- 4000
- 8000
Correct Option: B
From wein’s displacement law λmax T = constant
(λmax)1 T1 = (λmax)2 T2
1.45 × 2000 = 2.90 × T2
| T2 = |  | × 2000 |  | 2.90 |
T2 = 1000 K
