A) 20 cm
B) 35 cm
C) 30 cm
D) 25 cm
Correct Answer: C
Solution :
\[\lambda =?,\] \[f={{10}^{9}}Hz,\text{ }v=3\times {{10}^{8}}m/s\] We know, \[V=f\lambda \] \[\Rightarrow \] \[\lambda =\frac{V}{f}=\frac{3\times {{10}^{8}}}{{{10}^{9}}}m=\] \[3\times {{10}^{-1}}m=0.3m=30\,cm\]You need to login to perform this action.
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