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Electromagnetic Wave
A wave that consists of electric and magnetic fields that vibrate at right angles to each other.
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Electromagnetic Spectrum
All of the frequencies or wavelengths of electromagnetic radiation.
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Visible Light
Very narrow range of wavelengths and frequencies in the electromagnetic spectrum that humans can see.
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Reflection
The bouncing back of a ray of light, sound, or heat when the ray hits a surface that it does not go through.
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Diffraction
A change in the direction of a wave when the wave finds an obstacle or an edge, such as an opening.
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Translucent
Describes matter that transmits light but that does not transmit an image.
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Electric Field
Surrounds every charged object, pulls oppositely charged objects toward it and repels like-charge objects.
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Gamma Rays
EM waves that are often used in medicine. EM waves that have wavelengths shorter than 0.1nm.
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Infrared Waves
Shorter wavelengths and higher frequencies than microwaves. Wavelengths between 700nm and 1nm.
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Absorption
The transfer of light energy to particles of matter.
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Interference
The combo. of 2 or more wave that results in a single wave.
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Opaque
Describes an object that is not transparent or translucent (does not transmit any light).
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Magnetic Field
Surrounds every magnet.
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X Rays
EM waves that are often used in medicine. EM wave that have wavelengths between 0.001nm and 60nm.
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Microwaves
Shorter wavelengths and higher frequencies than radio waves. Wavelengths between 1mm and 30cm. Used in cooking and in radar.
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Scattering
An interaction of light with matter that causes light to change its energy, direction of motion, or both.
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Transmission
The passing of light or other form of energy through matter.
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Pigment
A substance that gives another substance or a mixture its color.
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Radiation
The transfer of energy as electromagnetic waves.
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Ultraviolet
Type of electromagnetic wave produced by the sun.
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Radio Waves
Cover a wide range of waves in the electromagnetic spectrum. Used for communication.
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Refraction
The bending of a wave as the wave passes between 2 substances in which the speed of the wave differs.
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Transparent
Describes matter that allows light to pass through with little interference.
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