The Spectrum of a Galaxy Is Observed to Have an H

question 27

Essay

The spectrum of a galaxy is observed to have an H $\alpha$ emission line at a wavelength of 928.7 nm.What is its redshift? (Note that the rest wavelength of the H $\alpha$ emission line is 656.3 nm.)

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Definitions:

Account Value

The total monetary worth of an investment or trading account at any given point in time.

Interest Rate

The rate charged or paid for the use of money, typically expressed as an annual percentage of the principal.

Annual Interest Rate

The percentage increase in money that occurs over a year, which includes interest on loans, deposits, or investments.

Investments

Assets or items acquired with the goal of generating income or appreciating in value over time.