physics

13 articles · All tags

• How Do Airplanes Fly? The Physics of Lift Explained
  Wings generate lift by deflecting air downward and creating lower pressure above the wing. Here is how angle of attack, speed, and wing shape make flight work.
• Quantum Computing
  What a quantum computer actually is — qubits, superposition, entanglement, and interference — and which problems it will and will not revolutionize.
• How GPS Works
  How a receiver on Earth calculates position from satellite signals — trilateration, atomic clocks, and the relativistic corrections that keep the system honest.
• The Gyroscope
  Why a spinning wheel resists being turned — angular momentum, precession, and the sensors that guide everything from bicycles to spacecraft.
• How Solar Cells Work
  The photovoltaic effect: how a silicon junction turns photons into current, why panel efficiency sits near 20%, and what actually limits it.
• Fiber Optics and Total Internal Reflection
  How light is trapped inside hair-thin glass strands by total internal reflection — the physics that carries the internet as pulses of light.
• How Loudspeakers Work
  From amplifier current to sound pressure: the moving-coil driver, why cabinets matter, crossovers, and the physics that limits every speaker no matter its price.
• How Microwave Ovens Heat Food
  A microwave oven heats by rotating polar molecules in an alternating electric field — why water heats, why ice is slow, why plates stay cool, and what the metal warnings mean.
• Heisenberg Uncertainty Principle
  The quantum mechanical limit on the simultaneous precision of position and momentum measurements: Δx·Δp ≥ ħ/2.
• Newton's Laws of Motion
  The three laws of classical mechanics — inertia, F = ma, and action–reaction — that form the basis of classical physics.
• Electromagnetic Spectrum
  The continuous range of electromagnetic radiation from radio waves to gamma rays, classified by frequency and wavelength.
• Maxwell's Equations
  The four equations that unify electricity and magnetism and predict electromagnetic waves traveling at the speed of light.
• Wave–Particle Duality
  The quantum-mechanical fact that entities such as light and electrons exhibit both wave-like and particle-like behavior depending on the experiment.