Activity 2. Photoelectric Effect Activity In order to be able to understand the photoelectric effect: Let's do some calculations and make some predictions as a warm up! Useful equations: E = in: = hell 1. One has a red laser pointer with a wavelength {M of mo nm. What is the energy (E) per photon emitted by the pointer? 2. Ifthe light source were a UV lamp with a wavelength of 254 nm and the work function (dbmetal = M inflfor a metal gives Flo = 298 nm. Would this source create photoelectrons? If so, what would be the kinetic energy [K.E.) of an electron ejected from this metal? 3. How could you increase the number of electrons ejected from the metal without changing the HE. for individual electrons