The frequencies of the spectral lines in light from a
The frequencies of the spectral lines in light from a distant galaxy are found to be two-thirds as great as those of the same lines in light from nearby stars. Find the recession speed of the distant galaxy.
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a low-power laser used in a physics lab might have a power of050 mw and a beam diameter of 30mm calculatea the average
the frequencies of the spectral lines in light from a distant galaxy are found to be two-thirds as great as those of
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