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What spped should a galaxy move with respect to us so that the sodim line at 589.0nm is observed at 589.6nm? |
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Answer» SOLUTION :SINCE `vlamda=c, (Deltav)/(v)=(Deltalambda)/lambda` (for small changes in v and `lambda)`.For `Deltalamda=589.6-589.0=+0.6nm` we get `["using Equation "(Deltav)/(v)=(upsilon_("radical"))/(c)]` `or, upsilon_("radical")approx +c ((0.6)/(589.0))=+3.06xx10^(5)m s^(-1)` =306 km/s THEREFORE, the galaxy is MOVING away from us |
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