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24 Cards in this Set
- Front
- Back
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power
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the rate of energy usage
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watt
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the standard unit of power in science
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electromagnetic spectrum
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the complete spectrum of light, including radio waves, infrared, visible light, ultraviolet light, X rays and gamma rays
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diffraction grating
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a finely etched surface that can split light into a spectrum
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emission
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the process by which matter emits energy in the form of light
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absorption
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the process by which matter absorbs radiative energy
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transmission
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the process in which light passes through matter without being absorbed
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reflection (scattering)
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the process by which matter changes the direction of light
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wavelength
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the distance between adjacent peaks of a wave
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frequency
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describes the rate at which peaks of a wave pass by a point
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cycles per second
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units of frequency for a wave; describes the number of peaks of a wave that pass by a given point in a second
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hertz
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the standard unit of frequency for light waves
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field
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an abstract concept used to describe how a particle would interact with a force
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electromagnetic wave
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a synonym for light, which consists of waves of electric and magnetic fields
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speed of light
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the speed at which light travels
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photon
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an individual particle of light, characterized by a wavelength and a frequency
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visible light
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the light our eyes can see, ranging in wavelength from 400-700 nm
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electromagnetic radiation
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another name for light of all types
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infrared light
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light with wavelengths that fall in the portion of the electromagnetic spectrum between radio waves and visible light
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radio waves
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light with very long wavelengths and low frequencies--longer than those of infrared light
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microwaves
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light with wavelengths in the range of micrometers to millimeters
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ultraviolet light
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light with wavelengths that fall in the portion of the electromagnetic spectrum between visible light and X rays
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X rays
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light with wavelengths that fall in the portion of the spectrum between ultraviolet light and gamma rays
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gamma rays
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light with very short wavelengths (and high frequencies)--shorter than those of X rays
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