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A star is moving towards the earth with ...

A star is moving towards the earth with a speed of `9 xx 10^(6) m//s`. If the wavelength of a particular spectral line emitted by star is `600 nm`, find the apparent wavelength.

Text Solution

Verified by Experts

The correct Answer is:
582
Here, ` v = 9 xx 10^(6) m//s lambda = 600 nm lambda. = ? `
`Delta lambda = - (v)/(c) lambda = - (9 xx 10^(6))/( 3 xx 10^(8)) xx 600 = - 18 nm `
`:. lambda. = lambda + Delta lambda = 600 - 18 = 582 nm`
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