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Questions  >>  CBSE XII  >>  Physics  >>  Electromagnetic waves
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Q)

In a plane electro magnetic wave the electric field oscillates simultaneously at a frequency $3 \times 10^{10} Hz $ and amplitude $50\;v/m$ what is the wave length of the wave

$\begin{array}{1 1} 1\;mm \\ 1\;cm \\ 1\;m \\ 0.1\;m \end{array} $

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A)
Solution :
$\lambda = \large\frac{c}{\alpha}$
$\qquad= \large\frac{3 \times 10^8}{3 \times 10^{10}}$
$\qquad= 0.01\;m$
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