A) 0.57
B) 1.75
C) 28
D) 0.04
Correct Answer: A
Solution :
[a] Use \[n=\frac{1}{hv}=\frac{I\lambda }{hc}\] \[\therefore \frac{{{n}_{UV}}}{{{n}_{IR}}}=\frac{{{\lambda }_{UV}}}{{{\lambda }_{IR}}}=\frac{400}{700}=\frac{4}{7}=0.57\]
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