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What Would Be the Observed Wavelength for the Balmer H $\alpha$

Question 27

Multiple Choice

What would be the observed wavelength for the Balmer H $\alpha$ line emitted at 486.1 nm by a quasar at redshift z =5?

A) 2.9 µm
B) 81.0 nm
C) 21.0 cm
D) 121.6 nm
E) 1.2 µm

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