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A 6000 Å H(beta) line emitted by hydroge...

A 6000 Å `H_(beta)` line emitted by hydrogen in a star is observed to be red shifted by 10 Å. Find the speed with which star is receding away from the earth.

Text Solution

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`-(Delta lamda)/lamda=V_(radial)/c`
`Delta lamda=10A`
`lamda=6000A`
`c=3 times 10^8 m//s`
`v=5 times 10^5m//s`
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