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[" 169.The periodic time of rotation of ...

[" 169.The periodic time of rotation of a certain star is "22" days and its radius is is is "],[" wavelength of light emitted by its surface be "4320A" ,the Doppler shifi "],[86400" sec) "],[[" (a) "0.033A," (b) "0.33A],[" (c) "3.3A," (d) "33A]]

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