When ultraviolet light is incident on certain metallic particles are emitted. These particles are called by Sunday | Mar 23 | Physics WAEC | 0 comments A. positrons B. protons C. photoelectrons D. photons Correct Answer: Option D – photons Users Also Read These:When a ray of light is incident normally on an…A ray of light is incident on a plane mirror at an…A ray of light strikes a plane mirror at a glancing…An electron makes a transition from a certain energy…A ray of light is incident on a body x as shown in…