Welcome to PhysicsWorld
Physics is the map of the universe, and you are the explorers! From the motion of atoms to the forces between planets, we make complex science fun and easy for students of all ages. Build your future with advanced STEM skills today.
Learn in Your Language: Each physics section below features topic boxes with course buttons in four languages: English, Spanish, Armenian, and Russian. Explore our modules and find your curiosity!
Vectors & Uncertainty in Measurement
Vectors & Components
Learn how to represent physical quantities with direction and resolve them into components.
Build a solid foundation in vectors, units, and experimental uncertainty so every calculation and lab result actually means something.
Uncertainty & Significant Figures
Understand measurement error, significant figures, and how to report results honestly.
Thermodynamics
Temperature & Heat
Laws of Thermodynamics
Kinetic Theory
Entropy & Disorder
Heat Engines
Thermal Expansion
Electromagnetism
Electric Fields & Potential
Electric Circuits & Ohm's Law
Magnetism & Magnetic Forces
Electromagnetic Induction
Quantum Physics
Waves & Optics
Photoelectric Effect
Atomic Models
Wave-Particle Duality
Uncertainty Principle
Subatomic Particles
Relativity
Special Relativity
Kinematics of Relativity • Time Dilation • Length Contraction
General Relativity
Gravity as Curvature • Spacetime Fabric • Gravitational Waves
Mass-Energy Equivalence
E=mc² Equation • Nuclear Physics • Conservation Laws