The unit of is: ( = intensity of an electromagnetic wave, c : speed of light) [2025]

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Solution

Q.
The unit of $\sqrt{\frac{2 I}{ε_{0} c}}$ is:

( $I$ = intensity of an electromagnetic wave, c : speed of light) [2025]

1 Vm

2 NC

3 Nm

4 ${NC}^{- 1}$

Ans.
(4)

$I = \frac{1}{2} ε_{0} E_{0}^{2} \times c \Rightarrow E_{0} = \sqrt{\frac{2 I}{ε_{0} c}}$

$E_{0} : electric field (N/C)$

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