8. Light is reflected away from shiny surfaces, but light is not reflected from other surfaces.
9. Light always passes straight through transparent material (without changing direction).
10. When an object is viewed through a transparent material, the object is seen exactly where it is located.
11. An object gives off a "potential image," which travels through space. When the "potential image" reaches a mirror, the image is reversed. Also, the image is distorted by a curved mirror. When the "potential image"
reaches a lens, the image may be turned upside down by the lens.
12. Blocking part of the lens surface would block the corresponding part of the image.
13. The purpose of the screen is to capture the image so that it can be seen. Without a screen, there is not image.