2016-PHYSICS-EN.pdf - Foxit PDF Reader 8 .1 - X . . . File Home Comment View Form Protect Foxit eSign Share Help Tell me... Q Find Eg 53 Lo 8 7 Co User Help Command Post Your Foxit Set to Default Register About Foxit Manual Center Line Help Idea Plug-Ins PDF Reader PDF Reader Start 2013-PHYSICS-EN.pdf 2016-PHYSICS-EN.pdf x 2016_PHYSICS_SOLUT... eSign PDF Docs FDE W a) Quantum theory suggests that electromagnetic waves transmit energy in discrete energy packets called photons, whereas classical theory suggests a wave model. i. Give one reason why the photoelectric effect cannot be explained 3 marks by a wave model. The figure below shows an apparatus used to measure the stopping potential of a certain photocell. The frequency of the light source is increased and the stopping potential is measured in each case. light source ii. Explain what is meant by stopping potential. 3 marks K X