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what is a redshift? (question #3 on the paper, not sure if the graph on there will help)

what is a redshift question 3 on the paper not sure if the graph on there will help class=

Respuesta :

A redshift is the displacement of spectral lines toward longer wavelength in radiation from distant galaxies and celestial objects. This is interpreted as a doppler shift that is proportional to the velocity of recession and thus to distance.
SydneyW
When light or other electromagnetic radiation from an object is increased in wavelength, or shifted to the red end of the spectrum

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