(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Sodium, aluminium and silver have work functions of 2.46, 4.08 and 4.73 eV respectively. Which, if any of these metals will emit photoelectrons when irradiated by Balmer-B photons from a hydrogen discharge lamp?

2. Relevant equations

[tex] Energy = 13.6(\frac{1}{n_{1}^{2}} - \frac{1}{n_{2}^{2}} [/tex]

3. The attempt at a solution

Using the above formula I have calculated that Balmer-B photons from a hydrogen discharge lamp have an energy of 2.55 eV.

My answer is none though, because I was under the impression that a photon has to give up all or none of its energy in a collision like this. So wouldn't the work function have to exactly match the photon energy?

That doesn't really sound right, but I'm sure that there is a condition about photons giving up all or none of their energy in this photoelectric stuff. Can someone please clarify?

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Photons striking a metal target

**Physics Forums | Science Articles, Homework Help, Discussion**