1. Snell’s law of Reflection: A fixed laser beam is incident on a rotating mirror and the scanning angle of the reflection beam is twice the rotation angle of the mirror. 

2. Snell’s law of Reflection:

a. Total internal reflection: A laser beam is directed into the center of an acrylic half-cylinder atop a rotation stage. One confirms Snell’s law of reflection and refraction from the angles of the incident, reflected, and transmitted beams. When the incident angle is larger than the critical angle, total internal reflection in the acrylic cylinder occurs. 

b. Minimum deflection angle of a prism: If an optical material is cut into a prism shape, the dispersion of the material can be determined with great accuracy by measuring the minimum deflection angle of the prism over a spectral range. This experiment demonstrates such a refractive-index measurement technique.