>>12984795Ok so here's the deal. Using the equation hf=?+KEmax we know that it takes a certain threshold frequency to liberate electrons from certain metals, i.e. the work function ?. Now the same frequency on different metals will leave a different KEmax, therefore ? is different, and it is harder to stop (cut-off) certain electrons from different metals. Is this right?
What I don't get is why Vo or eVo goes into the negative.
