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Fundamentals

From Newton’s laws to quantum mechanics — clear explanations, interactive calculators, and expert guides designed to build lasting physics understanding.

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Newton’s Second Law
F = ma
Mass-Energy Equivalence
E = mc²
Wave Equation
v = fλ
Mechanics Thermodynamics Quantum Relativity Electromagnetism Optics

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Physics Core Concepts

Core physics principles, formulas, study guides, motion laws, and problem-solving concepts.

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Waves & Optics

Wave motion, light behavior, reflection, refraction, diffraction, and optical physics concepts.

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Electricity & Magnetism

Electric fields, circuits, magnetic forces, electromagnetism, and current flow fundamentals.

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Thermodynamics

Heat transfer, entropy, thermal energy, temperature laws, and energy conservation principles.

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Physics Fundamentals FAQ

What are the main branches of physics?

The major branches include classical mechanics, electromagnetism, thermodynamics, quantum mechanics, and relativity.

What is the most important physics law?

Conservation of energy is one of the most universal laws because energy can change form but cannot be created or destroyed.

How does quantum mechanics differ from classical physics?

Classical physics explains large objects, while quantum mechanics explains particles at atomic and subatomic levels.

What does E=mc² actually mean?

Einstein’s equation shows that mass and energy are connected, and a small amount of mass can convert into a large amount of energy.

Why do we study physics fundamentals?

Physics fundamentals help explain motion, energy, gravity, electricity, waves, and the basic working of the universe.

Is physics relevant to everyday life?

Yes. Smartphones, cars, Wi-Fi, medical scans, engines, and electricity all depend on physics principles.

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