1. Photo-electric Effect
Animation

2. How are photoelectrons released?
This photon is below the threshold frequency
…but the electron does not have enough energy to escape.
One photon interacts with one electron…
Sunday, 28 April 2019
Leeds City College

3. How are photoelectrons released?
This photon is at the threshold frequency
…and the electron has just enough energy to escape…
…but will get pulled back by electrostatic attraction.
One photon interacts with one electron…
Sunday, 28 April 2019
Leeds City College

4. How are photoelectrons released?
This photon is well above the threshold frequency
…and the electron has plenty enough energy to escape.
One photon interacts with one electron…
This one gets pulled back
Sunday, 28 April 2019
Leeds City College