Abstract
The photoelectric effect caused classical physics and assumptions about energy to break down, resulting in the entire field of quantum physics to be created. In this report we use the photoelectric experiment set up to measure stopping voltages of different wavelengths of light in order to determine the value for Planck's universal constant from the slope of stopping voltage vs frequency plot. The importance of determining the value of a constant in different circumstances should never be squandered. Constants in physics are defined as fixed values and which have no uncertainty, so they must be true in any possible circumstance where they have an impact \cite{constant}. Even though there will be some uncertainty in the value we find, the accepted value falls close to the middle of our range which is a good result for the accuracy of the experimental setup.
