A) l / 2
B) l / 3
C) l / 4
D) l / 9
Correct Answer: A
Solution :
\[{{\lambda }_{neutron}}\propto \frac{1}{\sqrt{T}}\] Þ \[\frac{{{\lambda }_{1}}}{{{\lambda }_{2}}}=\sqrt{\frac{{{T}_{2}}}{{{T}_{1}}}}\] Þ\[\frac{\lambda }{{{\lambda }_{2}}}=\sqrt{\frac{(273+927)}{(273+27)}}=\sqrt{\frac{1200}{300}}=2\] Þ\[{{\lambda }_{2}}=\frac{\lambda }{2}.\]
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