# Homework Help: Photoelectric Effect

1. Jun 13, 2005

### harhar

How would I find the threshold frequency if the work function is 3.33eV?
I know how to calculate minimum frequency.

2. Jun 13, 2005

### himanshu121

$$K = \phi - hf_0$$
where K is K.E.
Now K>0
therefore threshold frequency will be when K=0