List of Figures

1. Inverse square law
2. Fresnel coefficients - a horizontal view
3. Pfund refractometer
4. Microwave Michelson Interferometer
5. Optical Michelson interferometer
6. Measurement of lens aberrations
7. Foucault test
8. Apparatus for measuring diffraction
9. Energy level diagram for Na
10. Concave grating spectrograph
11. Two beam holography