A) \[\mu \]
B) \[\frac{1}{2}m{{v}^{2}}=\mu mgs\]
C) \[\frac{1}{2}m{{v}^{2}}=\frac{1}{2}\times 10\times {{(10)}^{2}}=500kg.m/s.\]
D) \[v=10m/s,\mu =0.5,\,m=10kg,\,g=10m/{{s}^{2}}\]
Correct Answer: B
Solution :
Wavelength of lines emitted is \[\frac{1}{\lambda }=R\left( \frac{1}{n_{1}^{2}}-\frac{1}{n_{2}^{2}} \right)\] where R Rydbergs constant. Given, \[{{n}_{1}}=2,\,{{n}_{2}}=4\] \[\therefore \] \[\frac{1}{\lambda }=R\left( \frac{1}{{{2}^{2}}}-\frac{1}{{{4}^{2}}} \right)=\frac{3R}{16}\] \[\Rightarrow \] \[\lambda =\frac{16}{3R}\]You need to login to perform this action.
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