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30 Cards in this Set
- Front
- Back
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Electromagnetic Waves |
transverse wave consisting of changing electric & changing magnetic fields |
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Electric Field |
a field in a region of space that exerts electric forces on charged particles, field produced by electric charges or by charging magnetic field |
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Magnetic Field |
field in region of space that exerts magnetic forces, produced by electric charges or by charging magnetic field |
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Electromagnetic Field |
the transfer of energy by electromagnetic waves |
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Photoelectric Effect |
emission of electrons from metal caused by light striking the metal |
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Photons |
a packet of electromagnetic energy |
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Intensity |
rate at which waves energy flows through a given unit of area |
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Amplitude Modulation |
method of transmitting a radio signal in which amplitude of carrier waves |
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Electromagnetic Spectrum |
full range of EM radiation |
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Frequency Modulation |
method of transmitting radio signal wave varries amplitude |
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Thermograms |
color-coded pic using varitations in infrared raditation |
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Transparent |
description of material that allows most of light that strikes it to pass through |
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Translucent |
description of material scatters light that passes through |
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Opaque |
description material either absorbs all, nothing can be seen through it |
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Image |
copy of an object formed by reflected or refracted rays of light |
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Regular Reflection |
reflection occurs when parallel light waves stike a surface and all reflect in same direction |
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Diffuse Reflection |
occurs when parallel light waves strike rough uneven surface, go all directions |
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Mirage |
a false or disorted image |
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Polorized Light |
type light including light w/ waves that vibrate in only one plane |
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Scattering |
a process which light is redirected as it passes through medium |
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Dispersion |
process disolving by breaking into smaller pieces, process white light seperates into color |
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Secondary Colors |
new coloe results when two primary colors are combined |
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Complementary Colors of Light |
any two colors of light that combine to form a white light |
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Complementary Colors of Pigment |
any two colors of pigments that combine to form white light |
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Luminous |
description of object that gives off own light |
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Incadescent |
description of object hot enough to glow |
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Flourescense |
process in which phosphorcent material converts radiation into visible light |
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Phosphor |
solid material that emits light by flourscence |
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Laser |
device that generates beam of coherent light |
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Coherent Light |
light waves having the same wavelength w/ crests and troughs lined up |
