Lenard repeated these experiments with different metals. Choose a different metal and investigate the frequency vs stopping voltage. Use at least 5 different frequencies and tabulate your results as below..
Metal:
Wavelength
Frequency
Stopping voltage
Share your data with other students to get a data on a variety of metals.
You will have to calculate the frequency of each wavelength using c = fλ, so f = c/λ
Plot the data on the previous graph of frequency vs stopping voltage for each metal. Extrapolate the graphs to show the intercepts.