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Waves

TermDefinition
Waves Repeating disturbance that transfers energy
Medium Matter a wave travels through
Mechanical Wave Type of wave that must have a medium to travel through
Electromagnetic Waves Caused by vibrating electric charges, do not need a medium, ex.) light waves
Transverse Waves Matter in the medium moves perpendicular to the direction the wave travels, waves at the beach
Crest The highest point of a wave
Trough The lowest point of a wave
Wavelength The distance between 2 identical points
Amplitude (A) Energy or height of the wave
Longitudinal Waves AKA Compression Waves Matter in the medium moves parallel to the direction that the wave travels. sound waves
Compression Dense Regions
Rarefaction Less dense regions
Combination Waves Not purely transverse or compressional
Period (T) How long it takes a wave to pass (time period / cycle)
Frequency (f) The number of wavelengths that pass a fixed point each second (cycles / time period)
Velocity (v) Wavelength times frequency
Interference The ability of two or more waves to combine and form a new wave
Constructive Interference Waves add together
Destructive interference Waves subtract from each other
Standing Waves When waves of equal wavelengths and amplitude that are traveling together opposite directions continuously interfere with each other
Nodes Where 2 wave always cancel each other (destructive interference)
Antinodes Points in the halfway between 2 nodes where the amplitude is greatest (Constructive Interference)
Diffraction Bending of wave around a barrier
Reflection Occurs when a wave strikes an object and bounces off it (mirrors)
Law of Reflection The angle of incidence is always equal to the angle of reflection
Refraction Bending of a wave as it changes medium, due to a change in speed
Resonance Ability of an object to vibrate when it absorbs energy at its natural frequency
Doppler Effect The change in frequency due to motion of the source
Shock Waves Occurs when an object's speed is greater than or equal to the wave's speed through the medium
Created by: linamtz
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