First slide

Nature of electromagnetic wave

Question

Dimensions of $1 / (μ_{0} ε_{0})$ is (All symbols have their usual meaning)

Moderate

A

$[L^{2} / T^{2}]$
B

$[T^{2} / L^{2}]$
C

$[T / L]$
D

$[L / T]$

Solution

$c = \frac{1}{\sqrt{μ_{0} ε_{0}}}$
$∴ c^{2} = \frac{1}{μ_{0} ε_{0}}$
$or [L^{2} T^{- 2}] = \frac{1}{μ_{0} ε_{0}}$

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