A transistor is a 3-terminal semiconductor switch invented at Bell Labs in 1947. This guide covers what transistors are, how they actually work, BJT vs MOSFET vs FinFET vs GAAFET, and where the technology sits in 2026.
Physics
Bosons are the force-carrying particles of the Standard Model. Photons carry electromagnetic force, gluons carry the strong force, W and Z bosons carry the weak force, and the Higgs boson gives particles their mass. This guide covers each boson type, their properties, interactions, and role in fundamental physics, with clear explanations for students studying particle physics.
Everything in the universe is governed by four fundamental forces: gravity, electromagnetism, the strong nuclear force, and the weak nuclear force. Understanding these forces is essential for physics students. This guide explains each force, its mediating particle, relative strength, and range, along with the ongoing quest to unify them into a single theoretical framework.
The Standard Model of particle physics is the most successful scientific theory ever tested. It describes 17 fundamental particles and three of the four fundamental forces. This guide covers quarks, leptons, bosons, the Higgs mechanism, and the mathematical framework that holds it all together. Essential reading for physics students wanting to understand the building blocks of matter.
Special relativity changed our understanding of space, time, and energy forever. Einstein’s two postulates lead to mind-bending consequences: time dilation, length contraction, and mass-energy equivalence. This guide covers the mathematical framework of special relativity with clear derivations, thought experiments, and practical applications in modern physics.
Kinematic equations are the backbone of classical mechanics. If you can’t solve projectile motion, free-fall, and acceleration problems confidently, physics gets harder from here. This guide breaks down all four kinematic equations with clear derivations, worked examples, and practical tips for solving problems quickly on exams.
The Boltzmann constant connects the microscopic world of atoms to the macroscopic world of temperature and energy. It’s one of the fundamental constants in physics, appearing in statistical mechanics, thermodynamics, and quantum theory. I explain what the Boltzmann constant represents, its value, its mathematical significance, and how it bridges the gap between individual particles and bulk matter.
Symmetry in physics isn’t just about visual balance. It means an operation leaves physical laws unchanged. I explain the deep connection between symmetry and conservation laws, covering translational, rotational, and time symmetry. Noether’s theorem connects them all. Understanding symmetry is understanding why physics works the way it does.
The difference between macrostates and microstates confused me for months in statistical physics. Then a concrete example made everything click. I explain both concepts clearly, show how they relate to thermodynamic probability, and walk through real examples. Once you understand this distinction, statistical mechanics becomes much more intuitive.
The Jablonski diagram maps what happens to a molecule after it absorbs light. Fluorescence, phosphorescence, internal conversion, intersystem crossing — every pathway explained with diagrams, timescales, and real-world applications.
Wien’s displacement law and Wien’s distribution law are fundamental to understanding blackbody radiation. This guide covers both formulas, their derivations, and how they predict the relationship between temperature and peak emission wavelength.