### Atomic Spectra Post-Assessment Q. 29

Posted:

**Sun Oct 08, 2017 6:34 pm**In 1.0 s, a 60 W bulb emits 11 J of energy in the form of infrared radiation (heat) of wavelength 1850 nm. What is the energy per photon of light emitted? How many photons of infrared radiation does the lamp generate in 1.0 s?

I understand how to find the energy per photon (1.074 x 10-19 J), but how do you calculate the number of photons that are generated in 1 second?

Also, is 60 W and 11 J emitted just extra information?

I understand how to find the energy per photon (1.074 x 10-19 J), but how do you calculate the number of photons that are generated in 1 second?

Also, is 60 W and 11 J emitted just extra information?