[mentor's note - lightly edited to fix the Latex](adsbygoogle = window.adsbygoogle || []).push({});

Hi there,

I was hoping if someone could clear my small misconception for this equation.

[itex]f' = f \left( \frac{ 1- \beta }{ 1+\beta } \right)^2[/itex]

I had thought if the numerator is negative and denominator is positive that means the signal of light or what ever would be moving away from the source. But recently I have come across a question which shows the numerator be positive as the source moves away relative to a reference frame.

Was hoping if someone could tell me a bit more about this topic as it seems to be a bit confusing. I hope that made sense as well haha, if not I can try to explain it better/ give the problem.

Thanks!

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# Relativistic Doppler Effect

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