physics

Basic idea

The study of matter, energy, space, and time. Modern physics rests on two incompatible pillars: general relativity (gravity at large scales) and quantum mechanics (matter at small scales).

Key formulas

• Newton’s second law: $F=ma$
• Mass-energy equivalence: $E=mc^2$
• Schrödinger equation: $i\hbar\partial_t\psi = \hat H\psi$
• Einstein field equations: $G_{\mu\nu}+\Lambda g_{\mu\nu}=\dfrac{8\pi G}{c^4}T_{\mu\nu}$

Pages

• loop quantum gravity
• quantum loop gravity
• quantum physics
• relativity
• string theory

Siblings

• computer science
• math
• philosophy
• software engineering