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प्रश्न
Which expression gives the speed of electromagnetic waves in free space?
विकल्प
\[c=\frac{1}{\sqrt{\mu_0\varepsilon_0}}=3\times10^8\,\mathrm{m/s}\]
\[c=\frac{\mu_0}{\varepsilon_0}=3\times10^8\,\mathrm{m/s}\]
\[c=\sqrt{\mu_0\varepsilon_0}=3\times10^8\,\mathrm{m/s}\]
\[c=\frac{1}{\mu_0\varepsilon_0}=3\times10^8\,\mathrm{m/s}\]
MCQ
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उत्तर
In free space, the speed depends on vacuum permeability and permittivity through \[c=\frac{1}{\sqrt{\mu_0\varepsilon_0}}\]. Its value is \[3\times10^8\,\mathrm{m/s}\].
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