While studying about some physics things, I came to know a term Relativistic beaming. I looked up in wiki and found a pretty decent article which gives you an equation where the real and apparent luminosity are related by a factor of (Doppler factor)^3-a where a is spectral index.(adsbygoogle = window.adsbygoogle || []).push({});

But where's the derivation of this formula? google didn't help me much, neither did some common textbooks of Undergrad levek.

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# I Derivation of relativistic beaming equation

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