1. The problem statement, all variables and given/known data For a home work assignment, I have to build a theoretical device which uses a laser to boil water. But I have no idea how to figure out how long it would take the device to transfer enough heat to boil the water. The laser diode has a wavelength of 445nm. We are supposed to assume c=3.0*10^8. 2. Relevant equations How would I get from E=hf, to ΔT for water? Should I be using the Stefan-Boltzmann Law? Any help would be appreciated, thanks!