L lovelylex New member Apr 8, 2011 #1 This is the formula: L is luminosity in watts, D is distance in meters, B is brightness in watts/meters squared L=4?d2b I need a question, like a test question (and answer), involving this formula. Thanks in advance!
This is the formula: L is luminosity in watts, D is distance in meters, B is brightness in watts/meters squared L=4?d2b I need a question, like a test question (and answer), involving this formula. Thanks in advance!
