At what redshift would a quasar's emission line emitted at 121.6 nm show up at the "normal" wavelength of 486.1 nm of the Balmer H$\alpha$ line?
A) 1
B) 2
C) 3
D) 5
E) 7

Question

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The Answer of At what redshift would a quasar's emission line emitted at 121.6 nm show up at the "normal" wavelength of 486.1 nm of the Balmer H$\alpha$ line?
A) 1
B) 2
C) 3
D) 5
E) 7

At What Redshift Would a Quasar's Emission Line Emitted at 121.6