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September 2, 2014

September 2, 2014

Posted by **Sethi** on Friday, April 27, 2007 at 12:44pm.

Since the wavelength shift is to shorter wavelengths (from 400.2 in the lab to 400.0, the star is moving toward observer (Earth).

The speed of approach along the line of sight, V, is given by

(400.2 - 400.0)/400.0 = 0.2/400 = V/c

Solve for V.

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