Relation between refractive index, permittivity of Free space and permeability of Free space.

The value of electric permittivity of free space is

SI unit of in_(0) (permittivity of free space) is:

The unit of permittivity of free space epsilon_(0) is:

Write down the value of obsolute permittivity of free space.

Which of the following does not have the dimensions of velocity ? ( Given epsilon_(0) is the permittivity of free space , mu_(0) is the permittivity of free space , v is frequency , lambda is wavelength , P is the pressure , and rho is density , k is wave number , omega is the the angular frequency)