## Calculating Number of photons

(Wien's law: $T\lambda _{max}=\frac{1}{5}C_{2}$ )

Lusin_Yengibaryan_3B
Posts: 101
Joined: Wed Sep 30, 2020 9:33 pm

### Calculating Number of photons

How would we go about calculating the number of photons required for a liquid to absorb some amount of Joules of heat if we are only given wavelength and the part of the electromagnetic spectrum to which it belongs?

Nick Pascua 2L
Posts: 86
Joined: Wed Sep 30, 2020 9:43 pm
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### Re: Calculating Number of photons

Hello,

I believe if you use the equation E=hv and c=(lambda)v, then you can calculate E (which stands for the Energy per photon) by solving for v then using it in the E=hv equation. Since E stands for the Energy per photon, does it give you information about total energy (usually represented as a form of Watts)? Because I know that the total energy divided by the energy of one photon will give you the number of photons. If that's all it gives, then I'm not really sure.

I hope that somewhat helps!