If `c` is the speed of electromagnetic waves in vacuum, its speed in a medium of dielectric `K` and relative permeability `mu_(r)` is

The speed of electromagnetic wave in vacuum

The speed of electromagnetic waves in vacuum is

If c is the speed of electromagnetic waves in vacuum, its speed in a medium of dielectric constant K and relative permeability mu_r is

The speed of electromagnetic waves in vacuum is equal to

The speed of electromagnetic waves in a vacuum is given by…..