| A | B |
|---|
| Term used to describe a material that reflects or absorbs all light that strikes it. | Opaque |
| Term used to to describe a material that transmits light | Transparent |
| Term used to describe a material that scatters light as it passes through | Translucent |
| A straight line used to represent a light wave | Ray |
| Reflection that occurs when parallel rays of light hit a smooth surface and all reflect at the same angle | Rectangular Reflection |
| Reflection that occurs when parallel rays of light hit a rough surface and all reflect at different angles | Diffuse Reflection |
| A copy of an object formed by reflected ot refracted rays of light | Image |
| A flat mirror that produces an upright virtual image the same size as the object | Plane Mirror |
| An upright image formed where rays of light appear to meet or come from | Virtual Mirror |
| A mirror with a surface that curves inward | Concave Mirror |
| The point at which rays of light meet, or appear to meet, after being reflected (or refracted) by a mirror (or a lens) | Focal Point |
| An inverted image formed where rays of light meet | Real Image |
| A mirror with a surface that curves outward | Convex Mirror |
| The measure of how much a ray of light bends when it enters a new medium | Index of Refraction |
| An image of a distant object caused by refraction of light as it travels through air of varying temperature | Mirage |
| A curved piece of glass or other transparent material that is used to refract light | Lens |
| A lens that is thinner in the center than at the edges | Concave Lens |
| A lens that is thicker in the center than at the edges | Convex Lens |
| Three colors that can be used to make any other color | Primary Color |
| Any color produced by combining equal amounts of any two primary colors | Secondary Color |
| Any two colors that combine to form white light or black pigment | Complementary Color |
| An opaque substance used to color other materials | Pigment |
| The transparent front surface of the eye | Cornea |
| The ring of colored muscle around the pupil of the eye | Iris |
| The hole through which light enters the eye | Pupil |
| The layer of cells that lines the inside of the eyeball | Retina |
| Cells on the retina that detect dim light | Rod |
| Cells on the retina that detect color | Cones |
| Short, thick nerve that carries signals from the eye to the brain | Optic Nerve |
| Condition that causes a person to see distant objects as blurry | Nearsighted |
| Condition that causes a person to see nearby objects as blurry | Farsighted |
| An optical instrument that forms enlarged images of distant objects | Telescope |
| A telescope that uses convex lenses to gather and focus light | Refracting Telescope |
| Lens that gathers light from an object and forms a real image | Objective |
| A lens that magnifies the image formed by the objective | Eyepiece |
| A telescope that uses one or more mirrors to gather light from distant objects | Reflecting Telescope |
| Optical instrument that forms enlarged images of tiny objects | Microscope |
| Optical instrument that uses lenses to focus light and record an image of an object | Camera |
| A device that produces coherent light | Laser |
| A three-dimensional photograph formed by the interference between two laser beams | Hologram |
| Long, thin strand of glass or plastic that can carry light for long distances without allowing the light to fade out | Optical Fiber |
| The complete reflection of light by the inside surface of a medium | Total Internal Reflection |
