Cosmology (AQA A-Level Physics): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What causes the Doppler effect?
What causes the Doppler effect?
Motion of wave source relative to observer
What happens to wavelength when a source moves towards an observer?
What happens to wavelength when a source moves towards an observer?
Wavelength becomes shorter
What term describes light waves stretched due to a source moving away?
What term describes light waves stretched due to a source moving away?
Red-shift
Which equation correctly represents red-shift ?
Which equation correctly represents red-shift ?
What sign does the red-shift value have for objects moving towards Earth?
What sign does the red-shift value have for objects moving towards Earth?
Negative
What does red-shift of distant objects support in astronomy?
What does red-shift of distant objects support in astronomy?
Theory of an expanding universe
How does the Doppler effect help identify binary star systems?
How does the Doppler effect help identify binary star systems?
Reveals movement via Doppler shifts
What causes periodic dips in brightness in eclipsing binaries?
What causes periodic dips in brightness in eclipsing binaries?
One star passes in front of the other
What do large red shifts of quasars indicate?
What do large red shifts of quasars indicate?
Extremely distant & moving away fast
When does the primary minimum occur in an eclipsing binary light curve?
When does the primary minimum occur in an eclipsing binary light curve?
Larger star eclipses smaller star