Physics 12 Honors –Notes –Quantum Physics V2.0 (KWP) Page 1of 5For more information, refer to…. 1. Giancoli- Physics:Principles with Applications (5th Edition): Chapter 27 –Early Quantum Theory and Models of the Atom; Chapter 28 –Quantum Mechanics of Atoms; 2. Materials regarding AP Physics B & C Exams … as well as other resources.The Wave-Particle Duality 1. Planck proposed that energy is a distribution of very small discrete amounts of energy, E min . Each amount is related to the frequency of oscillation, f. Thus energy of any vibration is given by and h, Planck’s constant, Energy is QUANTIZED , not CONTINUOUS as had been presumed. 2. Einstein in 1905 hypothesized that some must be true of light. Light is emitted in packets with energy E = hf. This packet is called a (rest mass = 0). He proves this and receives a Nobel Prize for the PHOTOELECTRIC EFFECT . = ℎ = ℎ n ∈ N n=1,2,3……Note: 1μm= 1×10 -6 m 6.63×10 −4 ∙ ℎ Collector Emitter Photocell When light with high enough frequency is shone upon the photocell, electrons are emitted. Now, reversing the voltage of the battery we can stop electrons from getting across where= electron emitted with the greatest kinetic energy is called the stopping potential. It determines what the maximum kinetic energy is for the electrons. Work function,, is the minimum energy needed to unbind the electron from the metal emitter electrode.
