6) An electromagnetic wave travels from a non-magnetic optically transparent material with electric permittivity ε=1.0×10−¹¹ F/m into diamond (n=2.417). (Assume μ=μ0 here.) If the light has wavelength 750 nm in the medium, what are the
(a) velocity,
(b) wavelength, and
(c) frequency of the wave in diamond?