Question
The period of the wave will be.

Answer

  1. $0.025\mu\text{s}$
Explanation:
Time period, $\text{T}=\frac{1}{\text{v}}$
$\text{T}=\frac{1}{40\times10^6}$
$\Rightarrow\text{T}=0.25\mu\text{s}$

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