A) \[5.\times {{10}^{14}}\,m/s\]
B) \[2.25\times {{10}^{8}}\]m/s
C) \[4.0\times {{10}^{8}}\]m/s
D) Zero
Correct Answer: B
Solution :
\[v\propto \lambda \Rightarrow \frac{{{v}_{1}}}{{{v}_{2}}}=\frac{{{\lambda }_{1}}}{{{\lambda }_{2}}}\] \[\therefore \] \[{{v}_{2}}=\frac{{{v}_{1}}}{{{\lambda }_{1}}}\times {{\lambda }_{2}}=3\times {{10}^{8}}\times \frac{4500}{6000}=2.25\times {{10}^{8}}\]m/s
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