An electromagnetic wave with a frequency of 4.60×10^14 Hz propagates with a speed of 2.14×10^8 m/s in a certain piece of glass.
a Find the wavelength of the wave in the glass.
b Find the wavelength of a wave of the same frequency propagating in air.
c Find the index of refraction of the glass for an electromagnetic wave with this frequency.
d Find the dielectric constant for glass at this frequency, assuming that the relative permeability is unity.