CokeDiesel4

CokeDiesel4 t1_j2lg3c5 wrote

>While movement is expected in principle, the cosmic microwave background (CMB) is static over human time scales. > >The light comprising the CMB last scattered at the same time everywhere, when the universe was about 370000 years old. The CMB that we see consists of the light that is just now reaching us. As time goes on, light from more and more distant regions is able to reach us. In this way, the CMB depicts a spherical slice of the 370000-year-old universe (the "last scattering surface") at an ever increasing distance as time goes on.

I just had a stupid thought, since different wavelengths take different amounts of time to reach us does that mean the speed of light varies based on its frequency?

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