## Sapling Number 6

$H_{\psi }=E_{\psi }$

1-D: $E_{TOTAL}\psi (x)=E_{k}\psi (x)+V(x)\psi(x)=-\frac{h^{2}}{8\pi ^{2}m}\frac{d^{2}\psi(x)}{dx^{2}}+V(x)\psi(x)$

Ethan Goode 3H
Posts: 59
Joined: Wed Sep 30, 2020 9:51 pm

### Sapling Number 6

When a metal was exposed to photons at a frequency of 1.43×1015 s−1, electrons were emitted with a maximum kinetic energy of 3.10×10−19 J.
Calculate the work function, Φ, of this metal.

I calculated the energy per photon and the subtracted the kinetic energy from that, but got the wrong answer for work function. What am I doing wrong?

reyvalui_2g
Posts: 40
Joined: Wed Sep 30, 2020 9:52 pm

### Re: Sapling Number 6

If there is no input errors from you the only possible thing that I can think of is that it may be a rounding error.

Arti_Patel_2H
Posts: 43
Joined: Wed Sep 30, 2020 9:38 pm

### Re: Sapling Number 6

I agree, it's probably a rounding error. Also, make sure you're using parentheses when you're solving for the work function because depending on what calculator you're using, the numbers may be slightly off.

David Liu 3B
Posts: 35
Joined: Wed Sep 30, 2020 10:07 pm

### Re: Sapling Number 6

everything seems right, so you should probably check the parenthesis of your calculator like the last person said! I've found that adding extra parenthesis is always better (better safe than sorry) and just as a trick you only really need the first parenthesis and you don't need to work on closing it if it's the end of a calculation!