Concept explainers
The velocity of the galaxy relative to the Earth
Answer to Problem 52A
Explanation of Solution
Given:
The actual frequency of the light,
The observed frequency of the light,
Formula used:
Doppler effect: The observed
Where
Now, if the observer and the source are approaching each other, then the observed frequency is,
And, if the observer and the source are receding away from each other, then the observed frequency is,
Calculation:
The speed of light is known as,
Thus for the given case, using the given values in above formula,
Negative sign of above velocity denotes that the observer is moving away from the source, that is, the galaxy is moving away from the Earth.
Conclusion:
Hence, the relative velocity of galaxy with respect to the Earth is
Chapter 16 Solutions
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