In a Michelson interferometer, in order to shift the pattern by half a fringe, one of the mirrors at the end of an arm must be moved by: A) one wavelength
B) half a wavelength
C) one-quarter wavelength

Aplane flying horizontally at an altitude of 1 mile and a speed of of 500mih passes directly over a radar station. find the rate at which the distance from the plane to the station is increasing when it is 2mi away from the station.

If two parallel light rays hit a mirror, they will not be parallel to each other after they reflect.

Which is an advantage of subdividing science into different areas?