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Chapter 4
Light
| Term | Definition |
|---|---|
| Transparent | A material that transmits most of the light that strikes it. |
| Translucent | A material that allows some light to pass through and scatters it. |
| Opaque | A material that reflects or absorbs all of the light that strikes it. |
| Lens | a curved piece of glass or other transparent material that refracts light. |
| Convex Lens | Thicker in the center than at the edges. |
| Concave Lens | Thinner in the center than at the edges. |
| Cornea | Light enters the eye through the transparent front surface. |
| Pupil | An opening through which light enters the inside of the eye |
| Iris | A ring of muscle that contracts and expands to change the size of the pupil. |
| Retina | A layer of cells that lines the inside of the eyeball. |
| Rods | Are cells that contain a pigment that responds to small amounts of light. These cells allow you to see in dim light. |
| Cones | Cells that respond to color |
| Optic Nerve | The rods and cones send signals to the brain along this nerve. |
| Plane Mirror | A flat mirror that produces an upright virtual image the same size as the object. |
| Concave Mirror | A mirror with a surface that curves inward. |
| Convex Mirror | A mirror with a surface that curves outward. |
| Focal Point | The point at which light rays parallel top the optical axis meet, or appear to meet. |
| Optical Axis | An imaginary line that divides a mirror in half |
Created by:
Bmacyscience
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