(Solved): https://phet.colorado.edu/sims/cheerpj/photoelectric/latest/photoelectric.html?simulation=photoelect ...

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

FOLLOW THE INSTRUCTIONS CAREFULLY: 1. Click and download this applet to open the photoelectric simulator. 2. Put the "Intensity" to $100\%$. 3. Change the "Target" metal on the right hand side to Platinum. Experiment 1: a) Put the wavelength to $107\mathrm{nm}$. (You can input this directly into the wavelength box). b) Change the voltage of the battery until the current is just at zero. This is the stopping potential. (You should input numbers manually so you are at the cusp.) The magnitude of the stopping potential $V_0$ is $V$. The maximum electron kinetic energy is $\times 10^{?19}\mathrm{J}=\mathrm{eV}$. Experiment 2: a) Put the wavelength to $150\mathrm{nm}$. The magnitude of the stopping potential $V_0$ is $V$. The maximum electron kinetic energy is $\times 10^{?19}\mathrm{J}=\mathrm{eV}$. Based on these data, find the work function of the metal: $\mathrm{eV}$. Here is an indexed list of the work functions of a few common metals, measured in electron volts: Find the work function of the unknown metal (????? in the "Target" box) and use the information in the table to identify the metal. The unknown metal is number