1. Spectrum from a Prism

2. Example of a Spectrum

3. Kirchoff’s Laws

4. Spectra in the Lab

5. Photons of Light The smallest unit of light is a photon A photon is often called a particle of light The Energy of an individual photon depends on its wavelength (frequency) The Energy of a photon is proportional to its frequency: E = h f = hc /

6. Electromagnetic Spectrum

7. Energy Levels and Spectral Lines

8. Absorption vs. Emission

9. Unique Spectral Lines for Atoms

10. Emission Lines

11. Molecular Bands

12. Thermal Radiation

13. Spectrum from Mars

14. Doppler Shift

15. Doppler Shifted Spectral Lines

16. Radial Velocity and Doppler Shift

17. Doppler Broadening