//Example 25.1
c=3*10^8;//Speed of light (m/s)
n=1.923;//Index of refraction for zircon, See Table 25.1
v=c/n;//Speed of light in zircon (m/s)
printf('Speed of light in zircon = %0.2e m/s',v)
//Openstax - College Physics
//Download for free at http://cnx.org/content/col11406/latest