Suppose an object is at rest and that it is emitting radiation.An observer also at rest in the same reference frame observes the radiation to be blueshifted from its original frequency.This blueshift can be caused by:

Question

Quizplus · Accepted Answer

The blueshift observed while both the object and observer are at rest in the same reference frame can be caused by a gravitational wavelength shift, where radiation moves from a lower gravitational potential to a higher one, resulting in a blueshift.

Suppose an Object Is at Rest and That It Is