The Photoelectric Effect is a simulation tool to help you with your analysis. The Photoelectric Effect help you to see how light knocks electrons off a metal target, and recreate the experiment that spawned the field of quantum mechanics.

Sample Learning Goals
1. Visualize and describe the photoelectric effect experiment.
2. Correctly predict the results of experiments of the photoelectric effect: e.g. how changing the intensity of light will affect the current and the energy of electrons, how changing the wavelength of light will affect the current and the energy of electrons, how changing the voltage of light will affect the current and the energy of electrons, how changing the material of the target will affect the current and the energy of electrons.
3. Describe how these results lead to the photon model of light: e.g. argue that only a photon model of light can explain why, when light is shining on the metal but there is no current, increasing the frequency will lead to a current, but increasing the intensity of light or the voltage between the plates will not.

Non-obvious controls:
1. Select Show photons in the Options menu to show the light beam as composed of individual photons. Select Control photon number instead of intensity in the Options menu to change the Intensity slider to a Number of photons slider.
2. Use the camera icon () to take a snapshot of the graphs so that you can compare graphs for different settings.
3. You can Pause the sim and then use Step to incrementally analyze.
4. If you are doing a lecture demonstration, set your screen resolution to 1024x768 so the simulation will fill the screen and be seen easily.

Requirements:
* Java

The license of this software is Free, you can free download and free use this graphing software.