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?

Question

asked Nov 20, 2023 189k views

1 Answer

Ilya Kharlamov · Answer 1 · 2023-11-24T00:07:31+0000

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.