Summary


 1. Photoelectric Effect - Proved to us that light sometimes can act like a particle

2. What's the photoelectric effect? - When you shine light on certain metals they give off photoelectrons

3. Changing the light in this experiment produced unexpected results

 

When you brighten light….

 

Get more photoelectrons emitted

Increase frequency of light used…

 

Increase the energy of photoelectrons
4. Threshold Frequency-'DOORWAY '

 

Below Threshold

 

No Emission

 

 Above Threshold

 

 

Emission