Topic testPhysics15 questions5 concepts

Modern Physics topic test

Keep the modern-physics branch bounded with the photoelectric effect, atomic spectra, de Broglie matter waves, the Bohr model, and radioactivity / half-life so threshold emission, discrete lines, matter wavelength, quantized hydrogen levels, and probabilistic nuclear decay all stay tied to compact, visually honest benches instead of detached historical anecdotes.

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This first-pass topic test reuses the shared quiz engine, but it balances question selection across the included concepts so the topic is assessed as a broader branch instead of a single concept replay.

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Modern Physics topic test

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Included concepts

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Every topic test still points back to the published topic page and the included concept pages, so you can review the exact learning surfaces behind the questions.

Physics

Photoelectric Effect

Use one compact lamp-to-metal bench to see why light frequency sets electron emission, why intensity alone fails below threshold, and how stopping potential reads the electron energy honestly.

Open Photoelectric Effect Open concept test

Physics

Atomic Spectra

Link discrete emission and absorption lines to allowed energy-level gaps with one compact ladder-and-spectrum bench that keeps transitions, wavelengths, and mode changes tied together.

Open Atomic Spectra Open concept test

Physics

de Broglie Matter Waves

Use one compact matter-wave bench to see how particle momentum sets wavelength, why heavier or faster particles get shorter wavelengths, and how whole-number loop fits form a bounded bridge toward early quantum behavior.

Open de Broglie Matter Waves Open concept test

Physics

Bohr Model

Use a compact hydrogen bench to connect quantized energy levels, allowed transitions, and named spectral-line series while staying clear that Bohr is a useful historical model rather than the final quantum description.

Open Bohr Model Open concept test

Physics

Radioactivity and Half-Life

Use one compact decay bench to see why each nucleus decays unpredictably, why large samples still follow a regular half-life curve, and how to read remaining-count graphs honestly.

Open Radioactivity and Half-Life Open concept test