You will doing an assignment caller, "Phet Photoelectric Effect Part 1 Lab", please use link to below to help you with the assignment (it might take a while to load), but all other info will be provided below.

Link: https://phet.colorado.edu/sims/cheerpj/photoelectric/latest/photoelectric.html?simulation=photoelectric

Assignment:

1. .Set the initial conditions as follows: Intensity at 25 % Wavelength at 525 nm Target Sodium Voltage at 0

You should see a small drift of electrons (called photoelectrons because they are being released by light, they are just electrons though). Start a timer and count the number of electrons that hit the opposite plate in 30 seconds. Repeat this three times to get the average as shown in table 1.

Change the wavelength (THE SLIDER) to 530 nm and allow the system to stabilize and count again, repeat counting a few times to get an average. Keep the intensity at 25% for these trials; Caution: keep checking this. Repeat the process and fill in Table 1 in the Results section.

2. Set the initial conditions as follows: Intensity at 25 % Wavelength at 450 nm Target Sodium Voltage at 0

Set the initial conditions as follows: Intensity at 25 % Wavelength at 450 nm Target Sodium Voltage at 0 After stabilization for a bit perform your count. Again repeat the process in increments of 5% on intensity without changing the wavelength. Record the results in Table 2.

Results: Table 1 Wavelength Intensity Count(s) Current (nm) (%) 1 2 3 Avg 525 25 520 25 515 25 510 25 1 . Did changing the wavelength affect the photoelectron counts? If so how? 2. Did changing the wavelength affect the speed of the photoelectrons? If so how? (Hint: You might need to click: Show only highest energy electrons to see this properly ) 3. Did changing the wavelength affect the current measurement at the bottom? If so how