INTRODUCTION
In this experiment, you will test several optical aspects of electromagnetic waves such as polarization, reflection, and interference. The electromagnetic spectrum covers a wide range of frequencies. Visible light has a frequency of the order of 1014 Hz and wavelengths between 400 and 700 nm (1 nm = 10−9 m). Other well-known parts of the spectrum include radio waves (with frequencies near 106 Hz) and microwaves (with frequencies around 1010 Hz and wavelengths of a few centimeters). Microwaves can be generated easily and are particularly suited for laboratory investigations.