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NSEA · Photometry and Spectroscopy · Quiz

Photometry and Spectroscopy — quick quiz

5 real NSEA questions on Photometry and Spectroscopy. Instant scoring and solutions, no signup — see where you stand in ~3 minutes.

Question 1 of 4

HARD

A star's spectrum shows a prominent absorption line at observed wavelength 656.5 nm. This line corresponds to the Hα line with rest wavelength 656.3 nm. What is the radial velocity of the star relative to Earth (assuming non-relativistic motion)?