The Hydrogen Balmer Line H _$\beta$ Has a Wavelength of 486

question 28

Multiple Choice

The hydrogen Balmer line H _$\beta$ has a wavelength of 486.1 nm in the laboratory. It is observed in a quasar at 2430.5 nm. What is the fractional change in wavelength or redshift z of this quasar?

• A) 5
• B) 0.5
• C) 0.25
• D) 4
• E) 1944.4

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