Red shifting it the light waves being stretched out my the motion of the source relative to the receiver. Red light has longer waves so the light moves towards the red end of the spectrum... It's not literally red and the colour has nothing to do with how far it goes.
Okay, I got the how of it, wrong, but the components right. And, it does have a visual component. Light going away from you is red shifted, coming towards you is blue shifted.
They use red shifting as an explanation for their BBT, but it doesn't actually support it. It merely explains how they can determine distance and direction.
Red shifting it the light waves being stretched out my the motion of the source relative to the receiver. Red light has longer waves so the light moves towards the red end of the spectrum... It's not literally red and the colour has nothing to do with how far it goes.
Okay, I got the how of it, wrong, but the components right. And, it does have a visual component. Light going away from you is red shifted, coming towards you is blue shifted.
https://earthsky.org/astronomy-essentials/what-is-a-redshift/
They use red shifting as an explanation for their BBT, but it doesn't actually support it. It merely explains how they can determine distance and direction.