A) \[{{\lambda }_{m.}}/2\]
B) \[2{{\lambda }_{m.}}\]
C) \[{{2}^{4}}{{\lambda }_{m.}}\]
D) \[{{2}^{-4}}{{\lambda }_{m.}}\]
Correct Answer: A
Solution :
From Wiens displacement law, \[{{\lambda }_{m}}T=\] constant So, \[\frac{{{({{\lambda }_{m}})}_{2}}}{{{({{\lambda }_{m}})}_{1}}}=\frac{{{T}_{1}}}{{{T}_{2}}}\] \[\frac{{{({{\lambda }_{m}})}_{2}}}{{{\lambda }_{m}}}=\frac{1000}{2000}\] \[\Rightarrow \] \[{{({{\lambda }_{m}})}_{2}}=\frac{{{\lambda }_{m}}}{2}\]
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