Problem: what is the Poynting flux on a sphere if the Poynting vector S makes an angle of theta with the normal?(adsbygoogle = window.adsbygoogle || []).push({});

My instinct is S*cos(theta), but the overall problem I'm looking at implies it is S*cos(theta)^2. Can anyone help me on this?

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# Homework Help: Poynting flux on a sphere

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