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Phys: Modern Physics
TEKS P.9.A-D
| Term | Definition |
|---|---|
| photon | the fundamental, massless particle of light and all other forms of electromagnetic radiation |
| photoelectric effect | the emission of electrons from a material when electromagnetic radiation (like light) of sufficient frequency strikes it |
| work function | the minimum amount of energy needed to remove an electron from a solid surface |
| emission spectra | a collection of specific wavelengths of electromagnetic radiation (light) emitted by a substance, typically from electrons transitioning from a higher energy state to a lower one |
| ground state | the lowest possible energy state of a quantum mechanical system, such as an atom or molecule |
| excited state | a temporary condition of an atom, molecule, or other physical system where it possesses higher energy than its lowest possible energy configuration |
| quantum | the minimum discrete amount of any physical property involved in an interaction |
| Malus’s Law | describes how the intensity of a plane-polarized light beam changes after passing through a second polarizing filter, called an analyzer |
| superposition quantum states | a fundamental principle where a quantum system, like an electron, exists in multiple distinct states simultaneously until measured (analogy of a coin be both heads and tails at once) |
| Heisenberg uncertainty principle | it's fundamentally impossible to simultaneously know both the exact position and the exact momentum (or velocity) of a quantum particle, such as an electron, with perfect accuracy |
| wave-particle duality of light | quantum objects like photons and electrons exhibit both wave-like and particle-like properties |
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