Physics
Articles about matter, energy, forces and physical laws.
Muon
Muon (elementary particle)
Muzzle velocity
Navier–Stokes equations
Navier–Stokes equations: theory, applications, and mathematical challenges
Neutral particle
Neutrino
Neutron
Neutron (subatomic particle)
Neutron moderator
Neutron moderator: role, types, and importance in nuclear reactors
Newton (unit)
Newton (unit of force)
Newton metre
Newton metre (N·m) — SI unit of torque and moment
Newton's Law of Cooling
Newton's law of universal gravitation
Newton's laws of motion
Three foundational principles by Isaac Newton that describe how forces affect motion in classical mechanics and underpin much of engineering and physics.
Newtonian fluid
Nodal plane
Non-Newtonian fluid
Normal force
Normal force: definition, behavior on surfaces, and common examples
Overview of the normal force: the contact force perpendicular to a surface, its magnitudes on flat and inclined planes, role in friction and scales, and practical examples.
Normal lens
Normal lens (standard lens) in photography
Nuclear
Nuclear: concepts, technologies, and global significance
Nuclear chain-reaction
Nuclear energy
Nuclear explosion
Nuclear explosion: causes, effects, and historical context
Nuclear fallout
Nuclear fallout: causes, characteristics, history, and protection
Nuclear fission
Nuclear force
Nuclear force: the interaction that binds atomic nuclei
Nuclear fuel
Nuclear fuel: types, properties, and role in energy production
Nuclear fusion
Nuclear fusion: process, role in stars, and prospects for power
Nuclear fusion is the joining of light atomic nuclei into heavier ones, releasing energy. This article explains the physics, stellar role, confinement methods, earthly experiments,
Nuclear magnetic resonance
Nuclear physics
Nuclear physics: structure, reactions, history and applications
Nuclear power
Nucleon
Nucleon (proton and neutron)
A nucleon is any particle—proton or neutron—found in an atom's nucleus; composite baryons made of quarks that determine nuclear properties, binding, isotopes, and many applications
Nucleosynthesis
Ohm
Ohm (unit of electrical resistance)
Ohm's law
Optical depth
Optical filter
Optical filter: types, performance and common applications
Optical gain medium
Optics
P-type semiconductor
Pair production
Pair production: creation of electron–positron pairs from high-energy photons
Parity
Parity (P symmetry) in Physics
Particle
Particle: types, structure, properties, history and applications