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# Waves Vocabulary

TermDefinition
waves oscillations that carry energy
Oscillation an up and down or back and forth motion
Vacuum space that has no matter in it.
Mechanical Waves waves that move through matter
Types of Mechanical Waves disturbance in matter that transfers energy through the matter
Electromagnetic Waves waves that move through vacuums
Types of Electromagnetic Waves Radio waves, infrared rays, visible light, ultraviolet rays, X-rays, and gamma rays are all types of electromagnetic radiation.
Wave Properties frequency, amplitude, wavelength and speed
Amplitude one-half the distance between a waves high point. Measures how much a wave is displaced from its resting point.
Crest a waves high point
Trough a waves low point
Resting Point the position the medium would take if there were no wave
Wavelength and Symbol measured from a point on one wave to the same point on the next wave. (the Greek letter lambda)
Wavelength Units distance between two successive crests of the wave
3 Ways to Measure Wavelength are peak to peak or from trough to trough
Frequency number of waves that pass a fixed point in a given unit of time
Units for Frequency hertz (Hz) number of waves per second
Wave Speed time it takes a wave to move from one point to another
Wave Speed Units Wavelength x Wave Frequency
Wave Speed Equation wave speed= frequency x wavelength (v=f*A)
Medium A substance that makes possible the transfer of energy from one location to another
Reflection the change in direction of a wavefront at an interface between two different media so that the wavefront returns into the medium from which it originated
Law of Reflection principle that when a ray of light, radar pulse, is reflected from a smooth surface the angle of reflection is equal to the angle of incidence, and the incident ray, the reflected ray, and the normal to the surface at the point of incidence all lie in th
Reflected Ray A ray of light or other form of radiant energy which is thrown back from a non-permeable or non-absorbing surface
Incident Ray incident ray is a ray of light that strikes a surface
Refraction change in direction of propagation of any wave as a result of its traveling at different speeds at different points along the wave front.
Diffraction refers to various phenomena that occur when a wave encounters an obstacle or a slit.
Interference a phenomenon in which two waves superpose to form a resultant wave of greater, lower, or the same amplitude.
Constructive Interference interference is a phenomenon in which two waves superpose to form a resultant wave of greater, lower, or the same amplitude.
Destructive Interference a positive displacement of one wave is cancelled exactly by a negative displacement of the other wave.
Absorption he transfer of the energy of a wave to matter as the wave passes through it
Absorbed Colors different wavelengths appear as different colors of light
Reflected Colors The color that is within the source of light is not as same as the color of reflected light
Electromagnetic Spectrum extending from gamma rays to the longest radio waves and including visible light
Visible Light Spectrum wavelengths that are visible to most human eyes
Longitudinal Wave are waves in which the displacement of the medium is in the same direction as, or the opposite direction to, the direction of propagation of the wave.
Expansion becomes bigger or more extensive
Compression action or state of being squished down or made smaller or more pressed together
Intensity (of sound) amount of energy flowing per unit time through a unit area that is perpendicular to the direction in which the sound waves are traveling
Units of Sound A sound unit is any acoustic unit of sound measurement
Pitch quality that allows us to classify a sound as relatively high or low
Analog Signal continuous signal that contains time-varying quantities
Digital Signal an electrical signal that is converted into a pattern of bits
Created by: meganleibold

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