Sodium atoms in a Bose-Einstein condensate can slow the speed of light's energy
propagation to 70 km/hr. Find the index of refraction for this material, and
critical angle for total internal refraction if the atoms are otherwise in vacuum.
Please see the attached file.
The speed of light c' in a medium with refraction index n ...
The solution calculates the critical angle and index of refraction considering a Bose-Einstein condensate.