What are redshift and blueshift In Astronomy?

1 Answer

When a light source is coming towards you the waves get compressed and i is called blue shift.

Explanation:

When the light source is going away from you the waves get elongated and we call mit red shift.![ http://en.wikipedia.org](https://useruploads.socratic.org/xadzh57gRvOBfzZex8VV_download.png)

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