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Modern Physics

Special relativity, quantum mechanics, wave-particle duality, the uncertainty principle, and the revolutionary 20th-century physics that redefined our understanding of reality.

15 articles

Black-body radiation spectrum curves at different temperatures, showing the peak wavelength shifting with Wien's law

Modern Physics

Jul 25, 202613 min read

What Is Black-Body Radiation? Wien's Law and Stefan-Boltzmann Explained

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Quantum Numbers: n, l, m_l, m_s and Electron Configuration

Modern Physics

Jun 23, 202613 min read

What Are Quantum Numbers? n, l, mₗ, mₛ Explained

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Nuclear decay equations — alpha beta and gamma decay with conservation of A and Z

Modern Physics

Jun 20, 202613 min read

How to Write Nuclear Decay Equations — Alpha, Beta and Gamma

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Nuclear Binding Energy: Mass Defect, E = delta-m-c2 & Stability

Modern Physics

Jun 20, 202613 min read

What Is Nuclear Binding Energy? Mass Defect and the Stability Curve

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Mass-Energy Equivalence: E = mc² Derivation & Nuclear Applications

Modern Physics

Jun 17, 202613 min read

E = mc² — Mass-Energy Equivalence, Derived and Explained

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Half-life exponential decay curve showing N = N₀(½)^(t/t½)

Modern Physics

Jun 14, 202613 min read

How to Calculate Half-Life — Formula and Worked Examples

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De Broglie wavelength — electron wave with λ = h/mv formula showing wave-particle duality

Modern Physics

Jun 12, 202612 min read

λ = h/mv — The De Broglie Wavelength, Derived and Explained

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Bohr Model of the Atom: Energy Levels, Emission & Absorption Spectra

Modern Physics

Jun 8, 202613 min read

The Bohr Model of the Atom — Energy Levels and Eₙ = −13.6/n² eV

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Special relativity — spaceship travelling near light speed illustrating time dilation and length contraction

Modern Physics

Apr 17, 202618 min read

Time Dilation, Length Contraction and E = mc² — Special Relativity Explained

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Nuclear fission and fusion — uranium nucleus splitting and hydrogen nuclei combining with energy release arrows

Modern Physics

Apr 4, 202616 min read

Nuclear Fission vs Fusion — E = mc², Binding Energy and How They Work

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Photoelectric effect — photons hitting a metal surface and ejecting electrons with kinetic energy

Modern Physics

Apr 1, 202614 min read

How Einstein Explained the Photoelectric Effect

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Speed of light — light beam crossing space with c = 3 × 10⁸ m/s label and Einstein equation E = mc²

Modern Physics

Mar 30, 202615 min read

How Fast Is the Speed of Light, and How Was It First Measured?

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Wave-particle duality — electron double-slit experiment showing interference pattern alongside particle detections

Modern Physics

Mar 29, 202616 min read

Wave-Particle Duality — Why Light and Matter Are Both

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Heisenberg uncertainty principle — electron probability cloud illustrating position-momentum uncertainty

Modern Physics

Mar 24, 202614 min read

Heisenberg Uncertainty Principle: ΔxΔp ≥ ℏ/2 — Explained Simply

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Radioactive decay — unstable nucleus emitting alpha, beta, and gamma radiation with half-life graph

Modern Physics

Mar 20, 202616 min read

Alpha, Beta and Gamma Decay — How Radioactive Decay and Half-Life Work

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