It is a property of a medium that determines the. 11 10-31 kg Proton mass m p 1. The mathematical equation is.
Equation 6 As you can see the speed of light slows down in a dielectric relative to the speed in a vacuum.
Displaystyle v sqrt frac 1 mu _ 0epsilon _ 0approx 3times 10 8 text m s -1 The expression on the right happens to equal the speed of light. In a vacuum vph c0 299792458 meters per second a fundamental physical constant. E is the dielectric permittivity. Wavelength and frequency are related by the following formula.