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Light emitted from a distant star is obs...

Light emitted from a distant star is observed at frequency 5000 MHz for the star stationary with respect to us. If the star starts approaching us with speed `6xx10^(5)m//s`. Then the observed frequency will be

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`(Deltaf)/f=v/c`
`Deltaf=(5xx10^9xx6xx10^5)/(3xx10^8)=10xx10^6`
=`10^7` Hz = 10 MHz
As the source is approaching the observer
Observed frequency =`f+Deltaf`=5010 MHz
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