---
title: "University physics courses for revision - Kerfox"
description: "University physics courses open in Kerfox so far: Lasers and Quanta, Motion and Relativity and Energy and Matter. Each shows its lessons, one in full, and a question explained."
image: "https://www.kerfox.app/og.webp"
url: "https://www.kerfox.app/university/physics"
---
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[UNIVERSITY](https://www.kerfox.app/university)

# University physics

The physics courses open in Kerfox so far.

Each course is a run of short lessons, one idea to a lesson, built around a diagram and the equation that goes with it. The equations are typeset in full rather than described, and each course follows the order its topic is taught in, from the first principle to what it leads to.

Each page below lists a course’s lessons part by part, prints one lesson whole, and ends on a question with its answer and a note on every wrong option.

## The courses

- [

### Lasers and Quanta

Light and matter, the laser, fibres, quantum optics.

Revise a university course in lasers and quantum light: Einstein’s A and B coefficients, population inversion and gain, polarizers and Malus’ law, optical fibres and single photons.

](https://www.kerfox.app/university/physics/lasers-and-quanta)
- [

### Motion and Relativity

Newton to Einstein, in one course.

Revise university mechanics and special relativity: Newton’s laws, energy and momentum, rotation, gravitation and oscillation, then time dilation, the spacetime interval and mass as energy.

](https://www.kerfox.app/university/physics/motion-and-relativity)
- [

### Energy and Matter

Kinetic theory, the four laws, entropy, phases.

Revise university thermal physics: kinetic theory and the ideal gas, the Boltzmann factor, transport, the laws of thermodynamics, entropy, the thermodynamic potentials and phase changes.

](https://www.kerfox.app/university/physics/energy-and-matter)

Also in the app, with pages still to come: Electricity and Magnetism; and Waves, Light and Quanta.

[All university courses](https://www.kerfox.app/university)

IN THE APP

Every course here is in the Kerfox app, lesson by lesson, with questions that bring each topic back just before you are likely to forget it.

[Join the waitlist](https://www.kerfox.app/waitlist)