 <br> Using the graph shown in the figure for stopping potential vs. the incident frequency of photons, calculate Planck.s constant. <br> Using the graph shown in the figure for stopping potential vs. the incident frequency of photons, calculate Planck.s constant. <br> Using the graph shown in the figure for stopping potential vs. the incident frequency of photons, calculate Planck.s constant. <br> Using the graph shown in the figure for stopping potential vs. the incident frequency of photons, calculate Planck.s constant. 