One watt (W) is equal to 1 J/s. Assuming that 5.0% of the energy output of a 75 W light bulb is visible light and that the average wavelength of the light is 550 nm, how many photons are emitted by the light bulb each second?
This video solution was recommended by our tutors as helpful for the problem above.
Was this helpful?
Master The Energy of Light with a bite sized video explanation from Jules Bruno