The hydrogen Balmer line H has a wavelength of 434.0 nm in the laboratory. It is observed in a quasar at 651.0 nm. In terms of the speed of light, c, what is the recessional velocity of this quasar?
A) 217.0c
B) 2c
C) 1.5c
D) 0.67c
E) 0.5c
Correct Answer:
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