oops, that should read,
"Galaxy 1: Observed wavelength of hydrogen line is 659.2 nanometers.
Galaxy 2: Observed wavelength of hydrogen line is 664.4 nanometers.
Galaxy 3: Observed wavelength of hydrogen line is 683.1 nanometers. "
Homework Statement
I am trying to calculate, from their redshifts, the speed at which each of the following galaxies is moving away from us. Give your answers in both km/s and as a fraction of the speed of light.
The galaxies are:
Galaxy 1: Observed wavelength of hydrogen line is 659.2...