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The Redshift of the Quasar Cygnus a Is About 0

Question 98

Multiple Choice

The redshift of the quasar Cygnus A is about 0.046. In the spectrum of this quasar what is the wavelength of the Hα line in the hydrogen spectrum (in nanometers) ? The rest wavelength of the Hα line is 656.3 nanometers.


A) 30.2
B) 626.1
C) 656.3
D) 686.5

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