A) 14 mm
B) 7 \[\mu m\]
C) 2.8\[\mu m\]
D) 28mm
Correct Answer: C
Solution :
From Wiens displacement law \[{{\lambda }_{m}}=\] constant \[{{\lambda }_{1}}{{T}_{1}}={{\lambda }_{2}}{{T}_{2}}\] \[\Rightarrow \] \[{{\lambda }_{2}}=\frac{{{\lambda }_{1}}{{T}_{1}}}{{{T}_{2}}}\] Given, \[{{\lambda }_{1}}=14\mu m\], \[{{T}_{1}}=200\,K\], \[{{T}_{2}}=1000\,K\] \[\therefore \] \[{{\lambda }_{2}}=\frac{14\times 200}{1000}\] \[=28\,\mu m\]
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