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Introduction

Atomic World (Elective part) is one of the several volumes of the Physics in 24 hours series. It is specially written for students preparing for the HKDSE Physics Examination. The notes, examples and exercises in this book follow closely to the HKDSE Physics syllabus by the year of 2012. Detailed explanations on difficult concepts are given in this book. Its point-form notes can be a quick revision tool for students. “Quick-check” provides concept-clearing multiple choice questions as a benchmark of study progress at the end of every topic. In the Appendix section, revision reminders and the self-assessment questions were provided to enhance students' revision efficiency.

Contents

Topic 1 - Rutherford's Atomic Model

1.1 Rutherford's construction of an atomic model

1.2 Limitation of Rutherford's atomic model

1.3 Importance of scattering experiments and the impact on searching for new particles

Topic 2 - Photoelectric Effect

2.1 Evidence of light quanta

2.2 Einstein's explanation of photoelectric effect and photoelectric equation

Topic 3 - Bohr's atomic model of hydrogen

3.1 Line spectra

3.2 Bohr's model of hydrogen atom

3.3 Interpretation of line spectrum of hydrogen

3.4 Limitations of Bohr's theory of hydrogen

Topic 4 - Particles or Waves

4.1 Wave-particle duality of light

4.2 De Broglie formula

Topic 5 - Probing into nano scale

5.1 Physical properties of materials in nano scale

5.2 Seeing at nano scale

5.3 Recent development in nanotechnology

Supplementary documents

Corrigenda

Amendment Guide for 2016 HKDSE Fine-tune Syllabus

Supplementary Exercise