1. Chapter 2 The Ring Nebula

2. Figure 2.1 Andromeda Galaxy

3. Figure 2.2 Water Wave

4. Figure 2.3 Wave Properties

5. Figure 2.4 Charged Particles

6. Figure 2.5 Magnetism

7. Figure 2.6 Electromagnetic Wave

8. Figure 2.7 Visible Spectrum

9. Figure 2.8 Electromagnetic Spectrum

10. More Precisely 2-1 The Kelvin Temperature Scale

11. Figure 2.9 Ideal Blackbody Curve

12. Figure 2.10 Blackbody Curves

13. Figure 2.11 Spectroscope

14. Figure 2.12 Emission Spectrum

15. Figure 2.13 Elemental Emission

16. Figure 2.14 Solar Spectrum

17. Figure 2.15 Absorption Spectrum

18. Figure 2.16 Kirchhoff’s Laws

19. Figure 2.17 Classical Atom

20. Figure 2.18 Modern Atom

21. Figure 2.19 Atomic Excitation

22. Figure 2.20 Helium and Carbon

23. Figure 2.21 Hydrogen Spectra

24. Figure 2.22 Doppler Effect

25. Figure 2.23 Doppler Shift