Задача id17214

For a certain optical galaxy, radio galaxy 3S295 and quasar (quasi-stellar radio source) 3S9, the relative changes in the lengths of spectral lines turned out to be equal: z1=0.034, z2=0.46 and z3=2. Determine the ratio of the radial velocities of these sources to the speed of light; find the speeds of the sources.

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