An electromagnetic wave of frequency `v=3.0 MHz` passes from vacuum into a dielectric medium with permittivity `epsilon=4.0`. Then

An electromagnetic wave of frequency nu = 3.0 MHz passes from vaccum into a dielectric medium with permittivity in = 4.0 . Then,

An electromagnetic wave of frequency nu =3.0 MHz passes from vacuum into a dielectric medium with relative permittivity epsilon =4.0.Then

An electromagnetic wave of frequency 3 MHz passes from Vacuum into a dielectric medium with relative permittivity in_(r ) = 4.0 Then

An electromagnetic wave of frequency 3.0 MHz passes from vacuum into a non-magnetic medium with permittivity, in =16 in_(0) . Where in_(0) is the free space permittivity. The change in wavelength is