Contents 1
Preface 1
Photo acknowledgements 2
Light and sight 2
1 Light rays 2
Physics and technology 3
Scientific enquiry 5
2 Reflection of light 5
3 Plane mirrors 8
4 Curved mirrors 11
5 Lenses 15
6 The eye 19
7 Colour 22
8 Simple optical instruments 26
9 Telescopes 29
Additional questions 33
Matter and 38
molecules 38
10 Measurements 38
11 Density 44
12 Weight and stretching 47
13 Molecules 50
Additional questions 55
Forces and pressure 58
14 Moments and levers 58
15 Energy transfer 63
16 Pressure in liquids 69
17 Floating,sinking and flying 75
Additional questions 78
Heat and energy 82
18 Thermometers 82
19 Expansion of solids and liquids 85
20 Specific heat capacity 89
21 Latent heat 92
22 Conduction and convection 98
23 Radiation 104
24 Energy sources 108
Additional questions 116
25 Static electricity 120
effects 120
electromagnetic 120
Electricity and 120
26 Electric current 127
27 Potential difference 132
28 Resistance 137
29 Electric power 144
30 Electricity in the home 149
Additional questions 154
31 Magnetic fields 157
32 Electromagnets 162
Additional questions 168
Revision questions 169
Mathematics for physics 179
Answers 182