25.1-25.3 · Astronomy and cosmologyLesson 2 of 13Free preview
Where the 4πd² comes from
All the power crosses every sphere you draw. The sphere is what grows, not the power.
25.1-25.3 · Astronomy and cosmologyLesson 2 of 13Free preview
All the power crosses every sphere you draw. The sphere is what grows, not the power.