You record the spectrum of a star and find that a calcium absorption line has an observed wavelength of 394.0 nm. This calcium absorption line has a rest wavelength is 393.3 nm; what is the radial velocity of this star?
A) 5,000 km/s
B) 500 km/s
C) 50 km/s
D) 5 km/s
E) 0.5 km/s

Question

Quizplus · Accepted Answer

The Answer of You record the spectrum of a star and find that a calcium absorption line has an observed wavelength of 394.0 nm. This calcium absorption line has a rest wavelength is 393.3 nm; what is the radial velocity of this star?
A) 5,000 km/s
B) 500 km/s
C) 50 km/s
D) 5 km/s
E) 0.5 km/s

You Record the Spectrum of a Star and Find That