A spectral line of sodium normally has a wavelength of
A spectral line of sodium normally has a wavelength of 5890Angstroms. The same line measured in the spectrum of a star is at awavelength of 5625 Angstroms. At what speed in the star traveling? Is the star moving towards us or away from us?
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a spectral line of sodium normally has a wavelength of 5890angstroms the same line measured in the spectrum of a star
four identical charges 40 microceach are brought from infinity and fixed to a straight line thecharges are located 020
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