1. The problem statement, all variables and given/known data Most of the galaxies in the universe are observed to be moving away from Earth. Suppose a particular galaxy emits orange light with a frequency of 5e14 Hz. 1) If the galaxy is receding from Earth with a speed of 3325 km/s, what is the frequency of the light when it reaches Earth? 2. Relevant equations f ' = f ( 1 - v/c) 3. The attempt at a solution I did: f ' = 5e14 (1- 3.325e6/3e8) then converted Hz to fHz and got 4.9e29 but it was wrong.