Observations of the redshift of light emitted by a quasar Q1 indicate that it is moving away from the observer at a speed of 0.788c. Quasar Q2, which lies in the same direction as Q1 but closer to the observer, is moving away at 0.413c. What speed for Q2 would an observer on Q1 measure?
Observations of the redshift of light emitted by a quasar Q1 indicate that it is moving away from the observer at a speed of 0.788c. Quasar Q2, which lies in the same direction as Q1 but closer to the observer, is moving away at 0.413c. What speed for Q2 would an observer on Q1 measure?
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Observations of the redshift of light emitted by a quasar Q1 indicate that it is
moving away from the observer at a speed of 0.788c. Quasar Q2, which lies in
the same direction as Q1 but closer to the observer, is moving away at 0.413c.
What speed for Q2 would an observer on Q1 measure?
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