## Atomic Spectra Post Mod Q

H-Atom ($E_{n}=-\frac{hR}{n^{2}}$)

Rose_Malki_3G
Posts: 123
Joined: Wed Sep 30, 2020 10:02 pm

### Atomic Spectra Post Mod Q

In 1.0 s, a 60 W bulb emits 11 J of energy in the form of infrared radiation (heat) of wavelength 1850nm. How many photons of infrared radiation does the lamp generate in 1.0s?

connie ma 3G
Posts: 94
Joined: Wed Sep 30, 2020 9:38 pm
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### Re: Atomic Spectra Post Mod Q

Using C=wavelength x frequency and the wavelength (1850 nm) you were given, calculate the frequency. Make sure you change the wavelength to meters when doing so. Then use the frequency you just calculated and plug it into E=hv to solve for E, the energy per photon. Now divide the TOTAL energy (11J) by the energy per photon to get the number of photons.

Cecilia Cisneros 1F
Posts: 133
Joined: Wed Sep 30, 2020 9:45 pm

### Re: Atomic Spectra Post Mod Q

conniema_2B wrote:Using C=wavelength x frequency and the wavelength (1850 nm) you were given, calculate the frequency. Make sure you change the wavelength to meters when doing so. Then use the frequency you just calculated and plug it into E=hv to solve for E, the energy per photon. Now divide the TOTAL energy (11J) by the energy per photon to get the number of photons.

when you divide the total energy by the energy you found I seem to be getting 1.0 x 10^-18 which is none of the answers do you know why?