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sunSuns rays are isotropic,but but if we assume a small area dA$dA$, then the rays would be perpendicular to that crossection, and parallel with each othereachother.
sun rays are isotropic,but if we assume small area dA then the rays would be perpendicular that crossection and parallel with each other
Suns rays are isotropic, but if we assume a small area $dA$, then the rays would be perpendicular to that crossection, and parallel with eachother.
