The speed of electmagnetic waves in vacuum is equal to

Options

A. `mu_(0)epsi_(0)`
B. `sqrt(mu_(0)epsi_(0))`
C. `(1)/(sqrt(mu_(0)epsi_(0)))`
D. `(1)/(mu_(0)epsi_(0))`

Answer

C

Explanation

According to Maxwell, it is found that the electromagnetic waves travel in free space (or vacuum) with a speed is given by
i.e., `c = (1)/(sqrt(mu_(0)epsi_(0))) = 3 xx 10^(8) ms^(-1)`
where, `mu_(0)` and `epsi_(0)` are absolute permeability and permittivity of the free space, respectively.
where, `mu_(0) = 4pi xx 10^(-7) WbA^(-1)m^(-1)`
`epsi_(0) = 8.85 xx 10^(-12) C^(2)N^(-1)m^(-2)`