If a Galaxy Has a Recessional Velocity of 50,000 Km/s,at

question 21

Multiple Choice

If a galaxy has a recessional velocity of 50,000 km/s,at what wavelength will you observe the Hαemission line? Note that the rest wavelength of the Hα emission line is 656.3 nm.

• A)695.7 nm
• B)719.4 nm
• C)742.3 nm
• D)766.0 nm
• E)1750 nm

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Marginal Revenue

The increase in revenue that results from the sale of one additional unit of a product or service.

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