1. What actually happens in a photoelectron experiment? Watch the computer simulation. First experiment. The metal selected is . A. Starting with red light, as the frequency increases, at what frequency do electrons start to be ejected? This is called the threshold frequency, which is the incoming energy.

B. As the frequency of light increases, what happens to the speed of the ejected electrons?

C. Does the number of ejected electrons increase, decrease or stay the same when the frequency of light above the threshold energy increases with the same intensity

D. Does the number of electrons increase, decrease or stay the same when the frequency of light above the threshold energy is kept constant, and the intensity of light increases?