About the Catalog| sciencedemonstrations.fas.harvard.edu
What it shows: Waves reflecting from two surfaces can interfere constructively and destructively. In this case it is light waves that are being reflected at glass/air and air/glass interfaces. The interference produces a concentric ring pattern of rainbow colors in white light, or dark and light rings in monochromatic light. How it works: The convex surface of a long focal length lens (large radius of curvature) is placed in contact with a plane glass disk and clamped together, as shown in cr...| sciencedemonstrations.fas.harvard.edu