Hi, I think that this is (should be) a straight forward question: when conducting the double slit experiment, is there a relationship between the brightness / measure of the light source and the sum of the "peaks" from the interference pattern? (I have done a number of searches but can't find a specific answer to this - any links / references would be greatly appreciated.) On a slightly different note, am I right in saying that the quantum equivelant of this experiment (light source, silevered mirrors, half silvered mirror, detectors, etc. arranged in a square) is an idealised / thought experiment of the standard experiment? Regards, Noel.