Physics: Derivations, Proofs and Experiments

Derivation of the formula for wavelength for the Compton scattering, where a photon collides with an electron.

Derivation of the Hall voltage (via Hall effect), which depends only on quantities that we can easily determine in an experiment.

Here you will find the derivation of the acoustic and optical dispersion relation for a crystal with a diatomic basis.

Here you will learn how to derive the dispersion relation for a linear monoatomic chain using Hooke's law.

Simple derivation of the electric power P, which we express with voltage U and current I and then rewrite using the URI formula.

Derivation of the magnetic energy and energy density of the B-field using a current-carrying coil. The formulas are also valid in general.

Derivation of the energy of the electric field (E-field) using the charging process of a sphere (and a plate capacitor).

Derivation of the velocity formula for the elastic head-on collision of two different masses using conservation of momentum and conservation of energy.

A simple derivation of the phase velocity of a wave from the definition of the wavelength and the period.

Here you learn the derivation of the Euler-Lagrange equation, which a function q(t) must satisfy for a functional S[q] to become stationary.