Video Encyclopedia :Two people look into opposite ends of a box containing a half silvered mirror in the center. As the light on one end is dimmed, the light on the other brightens, causing metamorphosis.

Video Encyclopedia :Shine parallel beams at convex and concave mirrors. Use thread screen for display.

Video Encyclopedia :Shine parallel rays at spherical and parabolic mirror elements, noting the difference in aberration.

Video Encyclopedia :Hold a candle and other objects at the center of curvature of a large concave mirror.