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Ch. 22&23 Vocab*
| Question | Answer |
|---|---|
| eletromagnetic waves | a wave that consists of electric and magnetic fields that vibrate at right angles to each other |
| X rays | have wavelengths between 0.001 nm and 60 nm; can pass through many materials |
| radiation | transfer of energy as electromagnetic waves |
| electromagnetic spectrum | all of the frequencies or wavelengths of elctromagnetic radiation |
| microwaves | have shorter wavelengths and higher frequencies than radio waves; wavelengths between 1 mm to 30 cm |
| radio waves | cover a wide range of waves in the EM spectrum; longest wavelengths and lowest frequencies; only EM waves with wavelengths over 30 cm |
| infrared waves | have shorter wavelengths and higher frequencies than microwaves; wavelengths beween 700 nanometers and 1 mm |
| ultraviolet light | electromagnetic wave produced by sun; shorter wavelengths and higher frequencies that visible light; wavelengths are 60 nm to 400 nm |
| gamma rays | EM waves with wavelengths shorter than 0.1 nm; can penetrate most materials easily |
| visible light | very narrow range of wavelengths and frequencies in the EM spectrum that humans can see |
| scattering | an interaction of light with matter that causes light to change its energy, direction of motion, or both |
| absorption | the transfer of light energy to particles of matter |
| translucent | describes matter that transmits light but that does not transmit an image |
| transparent | describes matter that allows light to pass through with little interference |
| pigment | a substance that gives another substance or mixture a color |
| transmission | the passing of light or other form of energy through matter |
| opaque | describes an object thatis not transparent or translucent |
| concave lens | a lens that is thinner in the middle that at the edges |
| convex lens | a lens that is thicker in the middle than at the edges |
| concave mirror | a mirror that is curved inward like the inside of a spoon |
| convex mirror | a mirror that is curved outward like the back of a spoon |
| lens | a transparent object that refracts light waves such that they converge or diverge to create an image |
| plane mirror | a mirror that has a flat surface |
| hologram | a piece of film that produces a three-dimensional image of an object; made by using laser light |
| laser | a device that produces intense light of only one wavelength and color |
| nearsightedness | a condition in which the lens of the eye focuses distant objects in front rather than on the retina |
| farsightedness | a condition in which the lens of the eye focuses distant objects behind rather than on the retina |
Created by:
kbagal
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