Q.1. calculate the stopping potential for the photoelectrons emitted by a cesium chloride surface if the frequency of the incident radiation is 5.6 x 1014 per s

Q.1. Calculate the stopping potential for the photoelectrons emitted by a cesium chloride surface if the frequency of the incident radiation is 5.6 x 1014 per second. Given that the work function of cesium is 1.91 electron volt. What will happen to the emission of photo electrons if the frequency of the incident radiation is (i) halved. (Gi) Doubled?