Q. A double-paned window consists of two parallel panes of glass with an air gap between them. The outside pane has an index of refraction of 1.61 while the inside layer has an index of refraction of 1.51. If light enters the window from outside at 23.0° to the normal, at what angle to the normal does it exit the window on the inside?

Q. A point charge is distance from the center of a dipole consisting of charges separated by distance . The charge is located in the plane that bisects the dipole. At this instant, assuming r>>s what is the magnitude of the force on the dipole?