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a star is emitting light with a wavelength of 547 nm. when you observe it you find the light has a wavelength of 542 nm. is the star moving towards you or away from you?
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3 votes
a star is emitting light with a wavelength of 547 nm. when you observe it you find the light has a wavelength of 542 nm. is the star moving towards you or away from you?

User Alxp
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1 Answer

3 votes

Answer:

The wavelength measured is shifted towards the blue.

The star is moving towards the observer because successive radiated wavelengths are shortened because of the star's motion.

User Ilya Kharlamov
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