AP_Physics_B_-_Quantum_Mechanics

# AP_Physics_B_-_Quantum_Mechanics - QuantumMechanics AP...

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Quantum Mechanics  AP Physics B

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Quantum? Quantum mechanics is the study of processes which occur at the atomic scale. The word " quantum " is derived From Latin to mean BUNDLE. Therefore, we are studying the motion of objects that come in small bundles called quanta . These tiny bundles that we are referring to are electrons traveling around the nucleus.
“Newton, forgive me. .”,  Albert  Einstein At the atomic scale Newtonian Mechanics cannot seem to describe the motion of particles. An electron trajectory between two points for example IS NOT a perfect parabolic trajectory as Newton's Laws predicts. Where Newton's Laws end Quantum Mechanics takes over. ....IN A BIG WAY! One of the most popular concepts concerning Quantum Mechanics is called , “The Photoelectric Effect”. In 1905, Albert Einstein published this theory for which he won the Nobel Prize in 1921.

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What is the Photoelectric Effect? In very basic terms, it is when electrons are released from a certain type of metal upon receiving enough energy from incident light. So basically, light comes down and strikes the metal. If the energy of the light wave is sufficient, the electron will then shoot out of the metal with some velocity and kinetic energy.
The Electron-Volt = ENERGY Before we begin to discuss the photoelectric effect, we must introduce a new type of unit. Recall: This is a very useful unit as it shortens our calculations and allows us to stray away from using exponents.

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The Photoelectric Effect "When light strikes a material, electrons are emitted. The radiant energy supplies the work necessary to free the electrons from the surface."
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AP_Physics_B_-_Quantum_Mechanics - QuantumMechanics AP...

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