A) \[200\,\,{AA}\]
B) \[19\,\,{AA}\]
C) \[20\,\,{AA}\]
D) \[0.2\,\,{AA}\]
Correct Answer: B
Solution :
\[\frac{\Delta \lambda }{\lambda }=\frac{v}{c}\] Þ \[\Delta \lambda =\frac{5700\times {{10}^{6}}}{3\times {{10}^{3}}}=19{AA}\]
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