| A | B |
|---|
| telescope | an optical instrument that forms enlarged images of distant objects |
| refracting telescope | a telescope that uses two convex lenses to form images |
| objective | a lens that gathers light from an object and forms a real image |
| eyepiece | a lens that magnifies the image formed by the objjbective |
| reflecting telescope | a telescope that uses a concave mirror to gather light from distant objects |
| microscope | an optical instrument that forms enlarged images of tiny objects |
| camera | an optical instrument that uses lenses to focus light and film to record an image of an object |
| laser | a device that produces a narrow beam of coherent light |
| hologram | a three-dimensional photograph created using lasers |
| optical fiber | a long, thin stand of glass or plastic that can carry light for a ling distances without allowing the light to escape |
| total internal reflection | the complete reflection of light by the inside surface of a medium |
