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The 6000Å line emitted by a gaseouselement in a star iis found to have red shift of15Å. What is the speed with which the star is receding from the earth ? (c=3 xx 10^(8) m//s ) |
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Answer» `5xx10^(5) m//s ` ` Delta lambda=((v)/(c))lambda ` `:.""v=c((Delta lambda)/(lambda))=3 xx 10^(8) xx (15 xx 10^(-10))/(6000 xx 10^(-10))` `:. ""v=(45xx10^(8))/(6 xx 10^(3))=7.5xx10^(5) m//s ` |
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