Yo don't need an understanding of ay
"There is no such thing as incorrectly applying science that always applies. "
So, I could use the referenced radiance equation to calculate how long it would take two trains to meet on a train track if one left New York traveling west at 58 mph and the other train left San Diego traveling east at 77 mph?
I'm quite sure someone, with enough information, could calculate how much air is released from a balloon, and how quickly it's released, if you opened the valve. If you calculated that correctly, that doesn't mean you'd be correct if you tried to use the released air equation to determine the distance from Mars to Earth.