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10 questions from this quiz
Motion of wave source relative to observer
Wavelength becomes shorter
Red-shift
z=vc=Δffz = \frac{v}{c} = \frac{\Delta f}{f}z=cv=fΔf
Negative
Theory of an expanding universe
Reveals movement via Doppler shifts
One star passes in front of the other
Extremely distant & moving away fast
Larger star eclipses smaller star
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