08. ELECTROMAGNETIC WAVES (HM)
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निर्वात् में विद्युत-चुम्बकीय तरंग का वेग होता है
1 \(\sqrt {{\mu _o}{\varepsilon _o}} \)
2 \(\sqrt {\frac{{{\mu _o}}}{{{\varepsilon _o}}}} \)
3 \(\sqrt {\frac{{{\varepsilon _o}}}{{{\mu _o}}}} \)
4 \(\frac{1}{{\sqrt {{\mu _o}{\varepsilon _o}} }}\)
Explanation:
(d)\({\mu _0} = 4\pi \times {10^{ - 7}},\,{\varepsilon _0} = 8.85 \times {10^{ - 12}}\frac{{N{\rm{ - }}{m^2}}}{{{C^2}}}\)
so \(c = \frac{1}{{\sqrt {{\mu _0}{\varepsilon _0}} }} = 3 \times {10^8}\frac{{meter}}{{sec}}.\)
