A) a 100-watt lightbulb radiates energy at a rate of 100 \({\rm j/s}\) (the watt, a unit of power, or energy over time, is defined as 1 \({\rm j/s} if all of the light emitted has a wavelength of\(520{\rm nm}\), how many photons are emitted per second? (assume three significant figures in this calculation.)express your answer using three significant figures. b) how much energy (in \({\rm j}\)) is contained in 1.00 mole of 490\({\rm nm}\) photons? express your answer to three significant figures and include the appropriate units. c)part awhat is the de broglie wavelength of an electron traveling at 1.48