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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

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

Modern Physics

Jun 23, 202613 min read

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

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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

Nuclear Decay Equations: Alpha, Beta & Gamma Decay Explained

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Photoelectric Effect: hf = work-function + KE_max Calculations

Modern Physics

Jun 20, 202613 min read

Photoelectric Effect: hf = work-function + KE_max Calculations

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

Modern Physics

Jun 20, 202613 min read

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

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

Modern Physics

Jun 17, 202613 min read

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

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

Modern Physics

Jun 14, 202613 min read

Half-Life: Formula, Calculations & Worked Examples Explained

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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

De Broglie Wavelength: λ = h/mv Formula, Derivation & Examples

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

Modern Physics

Jun 8, 202613 min read

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

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

Modern Physics

Apr 17, 202618 min read

Special Relativity: Time Dilation, Length Contraction & E = mc² 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 and Fusion: E = mc², Binding Energy & 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

The Photoelectric Effect: Einstein's Equation, Work Function & 3 Worked Examples

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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

Speed of Light: c = 3×10⁸ m/s — Value, Formula & Why It's Constant

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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: de Broglie, Double-Slit & What Happens When Photons Hit Metal

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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

Radioactive Decay: Alpha, Beta, Gamma, Half-Life Formula & Examples

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