1. The problem statement, all variables and given/known data Consider a 75 Watt light bulb and an 850 Watt microwave. If the wavelengths of the radiation they emit are 500nm and 150nm, respectively, estimate teh number of photons they emit per second. Are teh quantum effects important in them? 2. Relevant equations ? [tex] M(T) = \sigma T^4 [/tex] Now this gives me the watts per meter^2. But I dont know the meter^2. (This doesnt make sense to me because the watts/meter^2 should be a function of the distance, farther out --> less watts/meter^2, but this function says nothing of distance...) 3. The attempt at a solution Dont know where to start! edit- My thoughts are I need to get teh Joules per second emitted from the object. I can then turn this into photons per second using the relationship [tex] E = h\nu [/tex] Thx for any help!