All light is bent or refracted as it goes from one medium to another, save in a direction perpendicular to the interface between the two mediums.
9 seconds sound clip from the The Flight of Dragons movie soundboard.
You can hear this line at 01:28:46.538 in the Blu-ray version of the movie.
Quote context
[...]
- You don't frighting me. Nothing so horrible could be real. I deny you!
- Deny me and you deny all magic. Say it then!
- Deny this... Kimpacto... solauu... insomaa. Eran... courant... palay. Ocaun... eeoan.
- Protons have 1832 times the mass of electrons.
- Gravity varies as to the inverse square of the distance.
- The velocity of light is equal to the wavelength times the frequency of vibration.
- Come devils, witches, demons, ogres, trolls, sand rats, harpies, ghouls, sorcerers!
[...]