Dual Nature of Radiation and Matter

Physics · Chapter 18 · Unit 7: Dual Nature of Radiation and Matter

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Your path through this chapter

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Visual lesson Beta
1. Part 1: The photoelectric effect and photons19 slides
2. Part 2: Planck’s constant, photon momentum and matter waves18 slides
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Notes Beta
5 sections with key terms, formulas and exam tips.
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Flashcards Beta
30 cards for quick recall of key terms and facts.
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Practice
75 board-style questions with instant checks: Numerical 18, Short answer 17, Multiple choice 16, Assertion and reason 8.
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Chapter test Free
Short and long chapter tests in board pattern, with results and analysis.
- Chapter test (long) — Dual Nature of Radiation and Matter · 40 marks · 100 min
- Chapter test (short) — Dual Nature of Radiation and Matter · 20 marks · 50 min
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Photoelectric effect: Hertz and Lenard's observations and experimental facts
Quantisation of radiation; Einstein's photoelectric equation E_max = h f - W0; threshold frequency and work function
Determination of Planck's constant from the stopping potential against frequency graph; photon momentum p = h/lambda
Wave-particle duality; de Broglie hypothesis lambda = h/p = h/(mv)
Electron diffraction and the Davisson-Germer experiment (qualitative)