alleryStart learning →The speed of an EM wave in vacuum equals:
- $1/\sqrt{\mu_0\varepsilon_0}$, approximately $3\times 10^8$ m/s
- $\mu_0\varepsilon_0$, the product of two constants here
- $\sqrt{\mu_0\varepsilon_0}$, the square root of the product
- $\mu_0/\varepsilon_0$, the ratio of the two constants directly
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Correct answer: A. $1/\sqrt{\mu_0\varepsilon_0}$, approximately $3\times 10^8$ m/s
$c = 1/\sqrt{\mu_0\varepsilon_0} \approx 3\times 10^8$ m/s in vacuum.