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chapter 22 &23 vocab
| Question | Answer |
|---|---|
| electromagnetic wave | a wave that consists of electric and magnetic fields that vibrate at right angles to each other |
| radiation | transfer of energy as electromagnetic waves |
| electromagnetic spectrum | all of the frequencies or wavelengths of electromagnetic radiation |
| asorption | in optics, the transfer of light energy to particles of matter |
| scattering | an interaction of light with matter that causes light to change its energy, direction of motion, or both |
| transparent | describes matter that allows light to pass through with little interaction |
| translucent | describes matter that transmits light but that does not transmit an image |
| opaque | describes an object that is not transparent or translucent |
| pigment | a substnce that gives another substance or a mixture its color |
| radiowaves | have some of the longest wavelengths and the lowest frequencies of all EM waves. used for broadcasting radio signals |
| microwaves | have shorter wavelenths and higher frequencies then radio waves. |
| infrared waves | have shorter wavelengths and higher frequencies than microwaves. |
| ultraviolet light | type of electromagnetic wave produced by the sun. shorter wavelengths and higher frequencies than visible light |
| visible light | the very narrow range of wavelengths and frequencies that humans can see. have shorter wavelengths and higher frequencies than infrared waves. |
| xrays | can pass through many materials, except lead. shortest wavelengths and highest frequencies out of all the waves |
| gamma rays | can penetrate most materials. second shortest wavelengths and second highest frequencies |
| transmission | the passing of light or other form of energy through matter |
| _______________________________________________ | _______________________________________________ |
| plane mirror | a mirror that has a flat surface |
| concave mirror | a mirror that is curved inward like the insides of a spoon |
| convex mirror | a mirror that curves outwards like the back of a spoon |
| lens | a transparent object that refracts light waves such that they coverge or diverge to create an image |
| convex lens | a lens that is thicker in the middle than at the edges |
| concave lens | a lens that is thinner in the middle than at the edges |
| nearsightedness | a condition in which the lens of the eye focuses distant objects in front of rather than in the retina |
| farsightedness | a condition in which then lens of the eye focusesdistant objects behind rather than on the retina |
| laser | a device that produces intense light of only one wavelength and color |
| hologram | a piece of film that produces a three-dementional image of an object; made by using a laser light |
Created by:
acarroll
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