Find the speed of light in the following a diamond ms b ice

Find the speed of light in the following (a) diamond m/s (b) ice m/s (c) sodium chloride m/s

Solution

a) refractive index of diamond n=2.42

speed of light in diamond Vd =c/n =3*10^8/2.42 =1.24*10^8m/s

b)refractive index of ice n=1.31 =>Vi =3*10^8/1.31=2.29*10^8m/s

c)refractive index of sodium chloride n=1.5442 =>Vw =c/1.5442 =1.94*10^8m/s