A) 306 m/s
B) 331 m/s
C) 340 m/s
D) 360 m/s
Correct Answer: A
Solution :
\[{{n}_{1}}=\frac{v}{{{\lambda }_{1}}}=\frac{v}{0.50}\] and \[{{n}_{2}}=\frac{v}{{{\lambda }_{2}}}=\frac{v}{0.51}\] \[\Delta n={{n}_{1}}-{{n}_{2}}=v\,\left[ \frac{1}{0.05}-\frac{1}{0.51} \right]=12\] Þ \[v=\frac{12\times 0.51\times 0.50}{0.01}=306\]\[m/s\]
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