Stars and other galactic objects may be moving towards or away from us at very h

Question

Stars and other galactic objects may be moving towards or away from us at very high speeds. This leads to a doppler shift of the electromagnetic radiation observed from this object. In each of the following cases, you are given the type of emitted radiation (as if you were at rest relative to the object) and the type of radiation towards which the observed light is shifted. From this information determine whether the object is traveling towards or away from you. Blue light emitted by the object is shifted towards ultraviolet radiation. Green light emitted by the object is shifted towards red light. Red light emitted by the object is shifted towards infrared radiation. Infrared radiation emitted by the object is shifted towards radio waves.

Explanation / Answer

When an object in space moves toward us it light waves are compressed into higher frequencies or shorter wavelengths, and we say that the light is blueshifted. When an object moves away from us, its light waves are stretched into lower frequencies or longer wavelengths, and we say that the light is redshifted.

A) towards

B)   Away

C)    Away

D)   Away

All the explaination is given by above three lines.

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