Spectrum of Light from Hydrogen

[Philosophaie]

The visible spectrum of light from hydrogen displays four wavelengths, 410 nm, 434 nm, 486 nm, and 656 nm normally.

Which changes when a telescope is pointed at a Galaxy that is moving away?

 

[UltrafastPED]

They all change; the same goes for the wavelengths which are not visible.

The process is detailed here: http://www.astro.ucla.edu/~wright/doppler.htm

Note that the ratio of observed over emitted wavelength is the same for all wavelengths; this is how we determine the red shift.