How To Find Placnks Constanr Fia Ke Max Experiment

Answer 1

Shine uv with emf turned off in plate, electrons will emit and based on ke cross the gap and form current

(E Acos Ute to reduce effect on air)

Now turn up thr emf. This will cause electric field to decelerate the electrons
- if electrons have enough ke to overcome the QV, then they will cross
- if not, the current in the system will drop to 0
- so increase emf until current is 0, this is max emf
- write down EQUATUON, rearrange repeat