What is the change in wavelength of light due to gravity, analogous to a Doppler shift, called?
Answer
Gravitational redshift
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What is the change in wavelength of light due to gravity, analogous to a Doppler shift, called?
Answer
Gravitational redshift
Which 2015 gravitational-wave discovery relied on frequency increasing as two black holes merged?
Answer
GW150914
What effect makes the cosmic microwave background appear hotter in Earth's direction of motion?
Answer
Doppler effect
Which astronomer published the velocity-distance law based on galaxy redshifts in 1929?
Answer
Edwin Hubble
What equation relates a galaxy's recessional velocity to its distance using redshift observations?
Answer
Hubble's law
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Latest trivia questions
What is the Doppler-based medical test for measuring blood flow in vessels called?
Answer
Doppler sonography
Which kind of binary star is detected by periodic Doppler shifts in its spectral lines?
Answer
Spectroscopic binary
What is the broadening of spectral lines caused by velocity-related Doppler shifts called?
Answer
Doppler broadening
What was Christian Doppler's middle name?
Answer
Andreas