Blog
In-depth articles on physics fundamentals written by physicists and educators. Clear explanations, real-world examples, and the conceptual depth you won't find in a typical textbook.
14 min readA ball whirled on a string, a car rounding a bend, the Moon orbiting Earth, an electron in a magnetic field — all are in circular motion. Despite moving at constant speed, every object in unifo...
Read article →
13 min readEvery electronic device you use — from the phone in your pocket to the lamp on your desk — operates according to a single elegant relationship: Ohm's Law. This law states that the current flowi...
Read article →
14 min readEverything electrical — lightning, batteries, neural signals, transistors — begins with one fundamental property of matter: electric charge. The force between charges, described by Coulomb's La...
Read article →
15 min readSimple harmonic motion (SHM) is the most important type of oscillation in physics. A pendulum swinging, a mass bouncing on a spring, a vibrating guitar string, an alternating electric current —...
Read article →
13 min readYou have heard the Doppler effect thousands of times: the pitch of an ambulance siren rises as it approaches and drops as it recedes. A racing car's engine note plunges as it passes. The effect...
Read article →
14 min readEvery breath you take, every balloon you inflate, every weather system on Earth is governed by one elegant relationship: the ideal gas law. PV = nRT connects the pressure, volume, temperature,...
Read article →
13 min readWhy does a sandy beach burn your feet while the adjacent sea stays cool, even after the same hours of sunlight? Why does water make the ideal coolant in car engines? Why does a large pot take s...
Read article →
16 min readEvery time you use a mobile phone, get an X-ray, feel the warmth of sunlight, or see the colours of a rainbow, you are interacting with the electromagnetic spectrum. The electromagnetic spectru...
Read article →
14 min readDrop a drop of ink into a glass of water. It spreads — slowly, irreversibly — until uniformly distributed. You will never see the ink spontaneously re-concentrate. Crack an egg: you cannot uncr...
Read article →
12 min readAcceleration is the rate at which velocity changes. Because velocity is a vector, any change in either the speed or the direction of motion constitutes acceleration. Every time you brake in a c...
Read article →
18 min readIn 1905, a 26-year-old patent clerk named Albert Einstein published four papers that transformed physics. One of them — "On the Electrodynamics of Moving Bodies" — introduced special relativity...
Read article →
12 min readSprings are among the most studied objects in physics — not because springs themselves are special, but because the spring restoring force is the simplest and most important type of restoring f...
Read article →
13 min readIn everyday language, "work" means effort or activity. In physics it means something precise and often counterintuitive: work is done only when a force causes displacement in the direction of t...
Read article →
15 min readMagnetism and electricity appear to be separate phenomena — a bar magnet attracts iron, while a charged balloon attracts paper. But they are two aspects of a single fundamental force: electroma...
Read article →
13 min readDrop a feather and a hammer in air: the hammer wins easily. Drop them in a vacuum: they land simultaneously. This demonstration — performed on the Moon by Apollo 15 astronaut David Scott in 197...
Read article →
11 min readIn everyday conversation, "speed" and "velocity" are interchangeable. In physics, they are fundamentally different quantities. Speed is a scalar — magnitude only. Velocity is a vector — magnitu...
Read article →
16 min readThe second law of thermodynamics is arguably the most profound statement in all of science. It explains why time appears to have a direction (why we remember the past and not the future), why n...
Read article →
14 min readFriction is the contact force that opposes relative motion between surfaces. It is why you can walk without slipping, why cars can brake, and why you need to keep pushing a box to keep it movin...
Read article →
15 min readIf you have ever heard a thunderclap, felt a bass beat through a wall, or watched a Slinky spring ripple back and forth, you have experienced longitudinal waves. Unlike transverse waves — where...
Read article →
14 min readA spinning ice skater pulls her arms inward — and immediately spins faster. A planet orbits faster when closer to the Sun. A gyroscope resists being tilted. A spinning top maintains its orienta...
Read article →
15 min readAn electric charge affects the space around it even before anything else is brought near. This influence on space is the electric field. Place a second charge in that field and it feels a force...
Read article →
13 min readWhen you push a door open, you push near the edge — not near the hinge. Instinctively you know that the same force applied further from the pivot produces a greater turning effect. That turning...
Read article →
16 min readKinetic energy is one of the two fundamental forms of mechanical energy — the other being potential energy. Where potential energy is stored energy waiting to be released, kinetic energy is ene...
Read article →
16 min readThe Sun has been shining for 4.6 billion years and will continue for another 5 billion. The energy source is not chemical — no amount of burning hydrogen gas could sustain that output for geolo...
Read article →
15 min readEvery time you look in a mirror, see a rainbow, or watch a straw appear bent in a glass of water, you are witnessing two of the most fundamental behaviours of light: reflection and refraction....
Read article →
12 min readTwo cars can do identical work climbing a hill — but if one does it in half the time, it is twice as powerful. Power is not about how much work is done; it is about how quickly work is done. Po...
Read article →
14 min readIn 1905 — his miraculous year — Albert Einstein published a paper explaining the photoelectric effect using a radical idea: light comes in discrete energy packets. This insight connects to both...
Read article →
14 min readA cricket ball and a lorry travelling at the same speed are very different things to stop. The lorry is far harder to halt — not just because it is heavier, but because it has far more momentum...
Read article →
15 min readThe speed of light — c = 299,792,458 m/s exactly — is the most fundamental constant in physics. It is the speed at which all electromagnetic radiation travels through a vacuum. It is the speed...
Read article →
16 min readLight behaves as a wave: it diffracts through slits, interferes with itself, and has a measurable wavelength. Light also behaves as a particle: the photoelectric effect shows it comes in discre...
Read article →
15 min readIn 1687, Isaac Newton published his Principia Mathematica — arguably the most important scientific work ever written. Among its results was a single equation that unified the fall of an apple w...
Read article →
14 min readIn 1801, Thomas Young performed one of the most elegant experiments in the history of physics. He shone light through two narrow slits onto a screen — and instead of two bright bands, he saw a...
Read article →
14 min readHeat spontaneously flows from hot objects to cold ones — the direction dictated by the second law of thermodynamics and the concept of entropy. But how does it actually transfer? There are exac...
Read article →
15 min readEvery time you charge your phone, drive a car, or switch on a light, you are using a technology built on a discovery made in 1831 by Michael Faraday: electromagnetic induction. Faraday found th...
Read article →
14 min readIn 1927, Werner Heisenberg derived one of the most famous results in all of science: it is fundamentally impossible to simultaneously know the exact position and exact momentum of a quantum par...
Read article →
14 min readA car brakes from 30 m/s to rest in 50 m. How long does it take? A ball is thrown upward at 15 m/s — how high does it go? A stone is dropped from a cliff — how fast is it moving after 3 seconds...
Read article →
13 min readA hammer can be balanced on a fingertip — but only if you position your finger at exactly the right point. A high-jumper arches their back over the bar so that their centre of mass passes under...
Read article →
16 min readEvery atom of carbon-14 in your body is slowly decaying. Every gram of uranium in Earth's crust is undergoing spontaneous nuclear transformation. Radioactive decay is the process by which an un...
Read article →
12 min readA climber hangs from a rope. A tow truck pulls a car. A pendulum bob swings on a string. In each case, a pulling force acts along the rope or string — the tension force. Tension is a pulling fo...
Read article →
13 min readEvery object launched into the air — a basketball, a cannonball, a water droplet from a fountain — traces the same distinctive curved path under gravity alone. That curve is a parabola, one of...
Read article →
12 min readEvery time you sit in a chair, stand on a floor, or press a book against a table, a force pushes back on you — perpendicular to the surface. This is the normal force. It is the contact force th...
Read article →
13 min readWhat Is the Kinetic Theory of Gases? The kinetic theory of gases is a scientific model that explains the macroscopic properties of gases — pressure, temperature, and volume — in terms of...
Read article →
14 min readEvery wave — whether a ripple on water, a sound in air, a transverse wave on a string, or a pulse of light crossing a vacuum — is governed by one fundamental relationship: v = fλ. This single e...
Read article →
11 min readEvery object in the universe with mass attracts every other object with mass. This isn't a metaphor — it's a precise, quantitative law. Newton's law of universal gravitation, published in 1687...
Read article →
11 min readEvery engine ever built, every metabolic reaction in your body, every star burning in the sky — all operate under one inviolable constraint: the first law of thermodynamics. It is, at its core,...
Read article →
16 min readWhen two billiard balls collide, when a rocket expels exhaust, when a gun recoils after firing, when subatomic particles scatter in a collider — the same deep principle governs every one of the...
Read article →
15 min readA basketball arcing toward the hoop, a cannonball launched from a fortress, a stream of water from a garden hose — all are examples of projectile motion. It's one of the first topics you encoun...
Read article →
12 min readWhat Is Energy? The Definition in Physics The definition of energy in physics: energy is a scalar quantity that measures the capacity of a system to do work or produce heat. It is not a...
Read article →
14 min readF = ma was discovered by Sir Isaac Newton and published in 1687 in Philosophiæ Naturalis Principia Mathematica. It is Newton's Second Law of Motion — the single most powerful and widely applied...
Read article →
22 min readWhen you pluck a guitar string, watch ripples cross a pond, or see light travel 93 million miles from the Sun to your eyes, you're witnessing transverse waves in action. A transverse wave is on...
Read article →
16 min readEvery object you have ever seen — every car on the highway, every satellite in orbit, every atom vibrating in your coffee cup — follows the same three rules. These are Newton's laws of motion,...
Read article →Get new physics articles, study tips, and platform updates delivered to your inbox every Thursday.