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

This is a pretty simple problem... Yet I got the wrong answer.. Hmm...

"Find the threshold frequency for a calcium surface whose work function is 3.33eV"

W=3.33eV = 3.33eV * 1.6x10^-19 J = 5.33x10^19 J

f = ?

h=6.63x10^-34 J*S

2. Relevant equations

f=W/h

3. The attempt at a solution

f=(3.33eV)(1.6x10^-19 J) / (6.63x10^-34 J*S) = 8.04x10^14 Hz <- My answer

The answer in book is 5.02 x10^14 Hz.

Can anyone tell me what i'm doing wrong?

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

Dismiss Notice

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!

# Find the threshold frequency for a calcium

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