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Ch. 14 Vocab
Physical Science
Term | Definition |
---|---|
Coherent light | Light of a single wavelength . Travels with its crests and troughs aligned in the same direction. |
Concave lens | Diverges light rays to form reduced upright virtual images. |
Convex lens | Converges light rays. |
Cornea | Transparent covering on eyeball. |
Focal point | Single point on optical axis of a concave mirror/convex lens where light rays press through. |
Incoherent light | Light that has more than than 1 wavelength and does not travel with its crests and troughs aligned in same direction. |
Index of refraction | Property of a material indicating how much light slows when traveling in a material. |
Mirage | Image of a distant object. Results when air at ground level is warmer/cooler than air layers above it. |
Opaque | Material that absorbs/reflects all light. |
Pigment | Colored material that absorbs some color and reflects other. |
Polarized light | Light where transverse waves vibrate in 1 direction. |
Retina | Inner lining of the eye that has cells that convert light images to electrical signals. |
Total internal reflection | Occurs when light strikes a surface between 2 materials. Completely reflects back into first material. |
Translucent | Material that allows some light to pass through but not enough to see clearly. |
Transparent | Material that lets all light through so it can be seen clearly. |
Fluorescent light | Light that results when UV radiation produced in fluorescent bulb. |
Incandescent light | Light produced by heating a piece of metal, usually tungsten, until it glows. |