Doppler-Effect

Doppler-Effect

The doppler-effect in astronomy is the fact that when things move away at a certain speed, their color changes to closer to red. When they are getting closer at a certain speed, their color is closer to blue.

This is due to the compressions and rarefractions in wavelengths (the same concept as in sound, but the light effect).

Doppler Effect - The Big Bang Theory

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