Go To The Section On Distances Inverse Square Law In Your Text And Review The

 Go to the section on Distances — Inverse Square Law in your text and review the topic.  The simple equation is B (W/m^2) = L (W) / 4*pi*d(m)^2What is the brightness (B W/m2) of the Sun (L = 4.0 x 1026 W) at the Earth (d = 1.5 x 1011 m)? What does your result mean in terms of light bulbs?