When at rest, hydrogen emits a green-blue line with a wavelength of 487 nm. In a...

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When at rest, hydrogen emits a green-blue line with a wavelength of 487 nm. In a certain galaxy, that same line is measured to have a wavelength of 504 nm. 1. Is the galaxy moving toward or away from us? How do you know? 2. Find the velocity of the galaxy. Show your work. When at rest, hydrogen emits a green-blue line with a wavelength of 487 nm. In a certain galaxy, that same line is measured to have a wavelength of 504 nm. 1. Is the galaxy moving toward or away from us? How do you know? 2. Find the velocity of the galaxy. Show your work.

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Answer This problem involves the Doppler effect which describes the change in frequency or wavelengt... View the full answer