Quantum Equations Flashcards
Energy of a photon
Photoelectric effect equation to determine energy of electrons escaping
Relation between the wavenumber and the momentum of a particle
de Broglie wavelength
Heisenbergs Uncertainty Principle
What does it tell us?
What is the intuitive explanation?
The more we improve the accuracy of measuring the position of some particle, the more we lose the accuracy of measuring its momentum, and vice versa.
When you increase the accuracy of identifying the position of particles x (i.e. ∆x becomes smaller), the uncertainty of momentum ∆p becomes greater.
When we try to decrease ∆x, we have to add more and more plane waves with different wevevectors. This effectively means that the distribution of k will be widen, leading to the increase of ∆k (∝ ∆p). That says, we cannot decrease both ∆x and ∆p at the same time as long as electrons are waves.
Solving the time-dependent Schrödinger equation
Fermi Energy Equation
ratios of reflected jr, and transmitted jt , particle fluxes to the incident flux jin:
Calculate fluxes, j
Equation to determine momentum of electron moving between boxes of diferrent electrostatic potential.
Mathematically what is Δx defined as?
What is the equation for Δp?
How much is an angstrom?
