Three filters each having a distinct wavelength, were used to carry out this experiment. Utilizing these filters, 435.8 nm, 546.0 nm, and 577.0 nm, data in voltage and current was collected, as potential was selected at random points for each wavelength. This data was then plotted (current vs. potential), and stopping potential was determined. Stopping potential for: 435.8 nm is 1.52 V, 546.0 nm is 1.17 V, and

577.0 nm is 0.8 V. This data was then used to calculate frequency for each wavelength utilizing the equation f = c/l. Frequency data was plotted against stopping potential as mentioned above to determine Plank's constant, h/e = 3.62 * 10-15 eV*s, also work function, F = 1 V, and threshold frequency, fo = 2.7 * 1014 Hz. Under 12% error is found when compared to the theoretical value (h/e = 4.14 * 10-15 eV*s) for Plank's constant. This can be a result from the graph, because the best fitting linear line is supposed to be provided in order to calculate Planck's constant. This has to be very accurate,

Goal: To find Plank's constant from the mentioned data. From the previous graphs, the stopping potential was determined for each wavelength. Frequency was calculated for each wavelength. Using this data another graph was constructed in order to determine Plank's constant. Stopping potential (Vo) versus frequency (f) was plotted using the following data in table 4.

Goal: To find stopping potential for different frequencies. Voltage was randomly selected in order to determine the stopping potential for each wavelength. These values were then plotted in a current (I) versus voltage (V) graph to determine the stopping potential for each wavelength. The results are as follows in the following tables for each wavelength.

0.4 * 10-6 A. Measurements for photocurrent were taken as voltage was retarding. Most of the data was taken at the region where the current 'saturates' so that accurate determination of stopping potential can be made. All of the above was then repeated for the other two filters, and all data was recorded.

An example of each calculation is provided in the appendix.

Some common words found in the essay are:
Photoelectric Effect, Threshold Frequency, Results Goal, Goal Plank's, stopping potential, plank's constant, electrons emitted, stopping potential vo, potential vo, * 10-15, 4358 nm, * 10-15 ev*s, 10-15 ev*s, frequency fo, wave theory, determine stopping potential, mercury light, function threshold frequency, 414 * 10-15,
Approximate Word count = 1811
Approximate Pages = 7 (250 words per page double spaced)