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Waves

Waves-Electromagnetic Spectrum Vocabulary

TermDefinition
wave a disturbance that transfers energy from one place to another without requiring matter to move the entire distance
medium physical material through which a wave travels
longitudinal wave a wave in which the particles of the medium vibrate parallel to the direction of the wave motion
transverse wave a wave in which the particles of the medium move perpendicularly to the direction the wave is traveling
mechanical wave a wave that requires a medium through which to travel
electromagnetic wave a wave that consists of electric and magnetic fields that vibrate at right angles to each other
amplitude the maximum distance that the particles of a wave's medium vibrate from their rest position
wavelength the distance between two adjacent crests or troughs of a transverse wave or the distance between two adjacent compressions or rarefactions of a longitudinal wave
wave period the time required for one wavelength to pass a given point
frequency the number of waves produced in a given amount of time, such as a second
Hertz a unit of wave frequency equal to one cycle per second
wave speed the speed at which a wave travels through a medium
radiation the transfer of energy as electromagnetic waves
electromagnetic spectrum all of the frequencies or wavelengths of electromagnetic radiation
infrared electromagnetic wavelengths immediately outside the red end of the visible spectrum
ultraviolet electromagnetic wavelengths immediately outside the violet end of the visible range
transparent describes matter that allows light to pass through with little interference
translucent describes matter that transmits light but that does not transmit an image
opaque describes an object that is not transparent or translucent; a material through which light cannot pass
absorption the transfer of light energy to particles of matter
refraction the bending of a wave as it passes between two substances in which the speed of the wave differs
reflection the bouncing back of a ray of light, sound, or heat when the ray hits a surface that it does not go through
scattering the spreading out of light rays in all directions
Created by: MrsTabor
 

 



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