What is the speed of star in the line of sight if a spectral line shifts towards longer wavelength side by `0.032%` ?
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`v = -(Delta lambda)/(lambda) xx c = -(0.032)/(100) xx 3 xx 10^(8) m//s` `=- 9.6 xx 10^(4) m//s` Negative sign of `v` indicates the star is moving away from earth.
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