railway RRB JE (CBT I + CBT II) Mock Test 2024 Electromagnetic Theory Electromagnetic Wave Propagation
The velocity of propagation of EM wave in free space is:
1
\(\sqrt {\frac{{{\varepsilon _0}}}{{{\mu _0}}}} \)
2
μ0ε0
3
\(\sqrt {\left( {{\mu _0}{\varepsilon _0}} \right)} \)
4
\(\frac{1}{{\sqrt {\left( {{\mu _0}{\varepsilon _0}} \right)} }}\)