The speed of em wave in the unit of `10^8m//s`, in a medium of dielectric constant 2.25 and relative permeablity 4 is:

The speed of electromagnetic wave in a medium of dielectric constant 2.25 and relative permeability 4 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

A wave is propagating in a medium of dielectric constant 2 and relative permeability 50. The wave impedance is

A wave is propagating in a medium of dielectric constant 2 and relative permeability 50 . The wave impedance is

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