In a photoelectric experiment, light is incident on a metal surface Electrons are ejected from the surface, producing a current m a circuit A reverse potential is applied in the circuit and adjusted until the current drops to zero That potential at which the current drops to zero is called the stopping potential The data obtained for a range of frequencies are graphed below For a frequency of light that has a stopping potential of 3 volts, what is the maximum kinetic energy of the ejected photoelectrons? From the graph and the value of the electron charge, determine an experimental value for Planck's constant. From the graph determine the work function for the metal. On the axes above, draw the expected graph for a different metal surface with a threshold frequency of 6.0 times 1014 hertz.
