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.
towardsaway Radio waves emitted by the object is shifted towards infrared light.
towardsaway Blue light emitted by the object is shifted towards infrared radiation.
towardsaway Green light emitted by the object is shifted towards red light.
towardsaway Infrared radiation emitted by the object is shifted towards radio waves.

l

Explanation / Answer

Travelling away from you produces a red-shift (longer wavelength) .. moving towards you produces a blue shift (shorter wavelength)

Wavelength increases .. (shortest) UV?blue?green?red?IR (longest)

1) away
2) towards
3) away
4) away

Related Questions

Navigate

• Browse (All)
• Browse S
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.