[jbvaliquette]

if the specific heat of water is 4.184 J/g degrees celcius how many photons of blue light (410nm) are required to raise the temperature of a 5 gallong bord bath 3 degess celcius assuming complete transfer of energy to the water and no influence from the bird bath container.

[DevaDevil]

an attempt?

[Padfoot]

Energy of photon= hf   (f=frequency, h=Planck's constant)