The Journal

All articles

Every piece we've published, sorted by date. Each ends with worked problems and a FAQ.

Electromagnetic Induction and Faraday’s Law

Electromagnetic induction generates a voltage when the magnetic flux through a coil changes. This guide covers Faraday's law, Lenz's law, the EMF formula, worked examples and the everyday technology it powers.

11 min read

Waves & Optics

Concave and Convex Lens

A clear comparison of concave and convex lenses: how each bends light, the images they form, the lens formula 1/f = 1/v − 1/u, worked examples and ray diagrams.

14 min read

Classical Mechanics

What Is the Center of Gravity in Physics?

The center of gravity is the single point where an object's whole weight acts. Learn the formula, how to find it, and why things balance or topple — with worked examples.

18 min read

Modern Physics

Radioactivity: Alpha, Beta & Gamma

Alpha, beta and gamma radiation compared: what each type is, what stops it, how the decay equations work — and why the least penetrating type is the most dangerous inside the body.

14 min read

Fluids

Bernoulli’s Principle & Applications

Bernoulli's principle links a fluid's speed, pressure and height: where the flow speeds up, the pressure drops. Inside: the formula, seven real applications, worked problems and the aircraft-lift myth debunked.

16 min read

Modern Physics

Photoelectric Effect Explained

How light ejects electrons from metals: Einstein's photoelectric equation, threshold frequency, work functions, worked problems and real-world uses of the photoelectric effect.

14 min read

Classical Mechanics

Moment of a Force (Turning Effect)

The moment of a force is the turning effect it produces about a pivot, found by multiplying force by perpendicular distance (M = F × d). Learn the formula, the principle of moments and the classic distance mistake — with eight worked examples.

16 min read

Fluids

Pascal’s Law & Hydraulics

Pascal's law says a pressure change in a confined fluid is transmitted equally in every direction. That one idea lets car brakes, trolley jacks and excavators turn a small push into an enormous force.

14 min read

Classical Mechanics

Snell’s Law Explained

Snell's law, n₁ sin θ₁ = n₂ sin θ₂, predicts exactly how much light bends when it crosses from one material into another. Learn the formula, the critical angle and total internal reflection through worked examples.

15 min read

Thermodynamics

Thermal Expansion Explained

Why do bridges have gaps, and why is the Eiffel Tower taller in summer? Thermal expansion explained with the ΔL = αL₀ΔT formula, real coefficients, worked examples and an interactive lab.

13 min read

Classical Mechanics

What Is Equilibrium in Physics?

Equilibrium in physics is the balanced state where the net force and net torque on an object are both zero, so it stays at rest or moves at constant velocity. This guide covers the two conditions (ΣF = 0 and Στ = 0), static vs dynamic equilibrium, the types of equilibrium, worked examples and FAQs.

15 min read

Waves & Optics

What Is Total Internal Reflection?

Total internal reflection traps light inside a denser medium once it strikes a boundary beyond the critical angle (sin θc = n₂/n₁). Here's how it works, eight worked examples, and why it powers fibre optics and makes diamonds sparkle.

13 min read

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