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Outline of physics

Adapted from Wikipedia · Discoverer experience

Physics is the natural science that studies matter and its motion through spacetime, along with ideas like energy and force. It helps us understand how the universe behaves. By looking at nature in a careful way, physics lets us explain many things around us, from the very small particles to the huge stars in the sky.

Physics is important because it forms the basis for many other sciences and technologies. It helps us create new tools, understand space, and even improve everyday life. Whether it's the light bulb in your home or the satellites that help us communicate, physics is at work.

Exploring physics means learning about the basic rules that govern everything in the universe. It's a fascinating journey that connects us to the world around us and helps us answer big questions about how everything works.

What type of subject is physics?

Physics is a type of science that studies how things move and work in our world. It is a special area of learning with its own classes, books, and groups of scientists who share their discoveries.

Physics is a natural science, meaning it tries to understand nature by observing and testing ideas. It focuses on non-living things, unlike biology, which looks at how living things work.

Branches

Physics is a science that studies how things move and change, along with ideas like energy and force. It helps us understand how the universe works.

Physics has many different areas of study. Astronomy looks at objects and events far from Earth, like stars and planets. Atmospheric physics studies the air around us. Atomic, molecular, and optical physics explores how tiny parts of matter and light behave. Biophysics uses physics to learn about living things. Chemical physics looks at how chemicals work. Computational physics uses math to solve physics problems. Condensed matter physics studies the ways different forms of matter act. Electricity and Electromagnetism study electric charges and magnetic forces. Geophysics looks at Earth using physics. Magnetism studies magnetic forces. Mathematical physics uses math to understand physics. Mechanics looks at how objects move when pushed or pulled. Medical Physics uses physics in medicine, like imaging and treatments. Statistical mechanics studies systems with many parts. Thermodynamics studies heat and energy. Nuclear physics looks at the tiny parts inside atoms. Particle physics studies the smallest pieces of matter and energy. Psychophysics looks at how we sense the world. Plasma physics studies a special state of matter. Quantum physics studies very small things that act in unusual ways. Quantum gravity tries to combine quantum physics with gravity. Relativity studies space and time, with both general and special types. Other areas include Agrophysics, which studies farms, Cryogenics, which studies very cold temperatures, Econophysics, which applies physics to economics, Materials physics, which studies different kinds of materials, and Vehicle dynamics, which studies how vehicles move. Finally, Philosophy of physics thinks about big ideas in physics.

History

History of physics – this is the story of how we learned about the world around us. It looks at how we understand things like matter, movement, energy, and forces.

History of fields of physics

General concepts

Physics is a science that studies matter and how it moves through space and time. It also looks at ideas like energy and force. Physics helps us understand how the universe works.

Physics looks at many important ideas such as how things move, the different states of matter like solids and liquids, and how energy works. It also studies waves, sound, electricity, magnetism, and light. Some key concepts in physics include how things change over time, the rules that govern motion, and the basic measurements scientists use.

TheoryMajor subtopicsConcepts
Classical mechanicsNewton's laws of motion, Lagrangian mechanics, Hamiltonian mechanics, kinematics, statics, dynamics, chaos theory, acoustics, fluid dynamics, continuum mechanicsDensity, dimension, gravity, space, time, motion, length, position, velocity, acceleration, mass, momentum, force, energy, angular momentum, torque, conservation law, harmonic oscillator, wave, work, power
ElectromagnetismElectrostatics, electrodynamics, electricity, magnetism, Maxwell's equations, opticsCapacitance, electric charge, electric current, electrical conductivity, electric field, electric permittivity, electrical resistance, electromagnetic field, electromagnetic induction, electromagnetic radiation, Gaussian surface, magnetic field, magnetic flux, magnetic monopole, magnetic permeability
Theory of relativitySpecial relativity, general relativity, Einstein field equationsCovariance, Einstein manifold, equivalence principle, four-momentum, four-vector, general principle of relativity, geodesic motion, gravity, gravitoelectromagnetism, inertial frame of reference, invariance, length contraction, Lorentzian manifold, Lorentz transformation,mass–energy equivalence, metric, Minkowski diagram, Minkowski space, principle of relativity, proper length, proper time, reference frame, rest energy, rest mass, relativity of simultaneity, spacetime, special principle of relativity, speed of light, stress–energy tensor, time dilation, twin paradox, world line
Thermodynamics and statistical mechanicsHeat engine, kinetic theoryBoltzmann constant, conjugate variables, enthalpy, entropy, equation of state, equipartition theorem, first law of thermodynamics, free energy, heat, ideal gas law, internal energy, irreversible process, partition function, pressure, reversible process, second law of thermodynamics, spontaneous process, state function, statistical ensemble, temperature, thermodynamic equilibrium, thermodynamic potential, thermodynamic processes, thermodynamic state, thermodynamic system, third law of thermodynamics, viscosity, zeroth law of thermodynamics
Quantum mechanicsPath integral formulation, scattering theory, Schrödinger equation, quantum field theory, quantum statistical mechanicsAdiabatic approximation, correspondence principle, free particle, Hamiltonian, Hilbert space, identical particles, matrix mechanics, Planck constant, operators, quanta, quantization, quantum entanglement, quantum harmonic oscillator, quantum number, quantum tunneling, Schrödinger's cat, Dirac equation, spin, wavefunction, wave mechanics, wave–particle duality, zero-point energy, Pauli exclusion principle, Heisenberg uncertainty principle
FieldSubfieldsMajor theoriesConcepts
Particle physicsAccelerator physics, nuclear physics, nuclear astrophysics, particle astrophysics, particle physics phenomenologyStandard Model, quantum field theory, quantum chromodynamics, electroweak theory, effective field theory, lattice field theory, lattice gauge theory, gauge theory, supersymmetry, Grand Unified Theory, superstring theory, M-theoryFundamental force (gravitational, electromagnetic, weak, strong), elementary particle, spin, antimatter, spontaneous symmetry breaking, brane, string, quantum gravity, theory of everything, vacuum energy
Atomic, molecular, and optical physicsAtomic physics, molecular physics, atomic and molecular astrophysics, chemical physics, optics, photonicsQuantum optics, quantum chemistry, quantum information scienceAtom, molecule, diffraction, electromagnetic radiation, laser, polarization, spectral line, Casimir effect
Condensed matter physicsSolid-state physics, high-pressure physics, low-temperature physics, nanoscale and mesoscopic physics, polymer physicsBCS theory, Bloch's theorem, Fermi gas, Fermi liquid, many-body theoryPhases (gas, liquid, solid, Bose–Einstein condensate, superconductor, superfluid), electrical conduction, magnetism, self-organization, spin, spontaneous symmetry breaking
AstrophysicsCosmology, gravitation physics, high-energy astrophysics, planetary astrophysics, plasma physics, space physics, stellar astrophysicsBig Bang, Lambda-CDM model, cosmic inflation, general relativity, law of universal gravitationBlack hole, cosmic background radiation, cosmic string, cosmos, dark energy, dark matter, galaxy, gravity, gravitational radiation, gravitational singularity, planet, Solar System, star, supernova, universe, nova

Lists

Index of physics articles

Related articles

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