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42 Cards in this Set
- Front
- Back
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form of a wave
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transverse and longitudinal
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properties of a wave
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wavelength, period, frequency, amplitude, speed of a wave
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the distance of one cycle of motion, variable is lambda and unit is meter
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wavelength
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time it takes for one cycle of a wave; variable T and unit is second
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period
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number of cycles per unit of time; variable is f and unit is hertz
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frequency
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height of a wave
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amplitude
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types of waves
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mechanical and non mechanical
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a wave that needs matter to travel through; examples are sound and standing waves
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mechanical waves
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don't need matter to travel through; example is light
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non mechanical waves
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travel as longitudinal waves and as a mechanical wave; it moves by compressing air molecules and then spreading apart of molecules
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sound
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what is the frequency range for humans
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20-20000
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what is frequency for dog
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20-100000
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what two factors is the speed of sound affected by
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material it travels through and temperature
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causes the frequency or wavelength to be altered slightly due to the source or observer moving away or toward
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doppler effect
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what is reflection of sound also called
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echo
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unified electricity and magnetism by predicting the speed of electromagnetic waves to be 3x10^8 m/s
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maxwell
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electric field traveling as a transverse wave, with a B field traveling as a transverse wave perpendicular and in phase (minimum and maximum amplitudes match)
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electromagnetic radiation
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smallest piece of EM radiation
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photon
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what the the amount or brightness of EM wave related to
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amplitude of a wave
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states the angle of incident is equal to the angle of reflection
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Law of reflection
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bending of light as it moves from one material to another due to a change in speed
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refraction
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what is the change is light speed that is caused by a property of a material called
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index of refraction
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spreading of light as it moves through an opening
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diffraction
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occurs when light with multiple wavelengths is broken up into its different components due to the fact that different wavelengths of light have slightly different indices of refraction
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dispersion
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what two things can light behave like
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a particle or a wave
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when more than one wave occupies the same space at the same time, the amplitude of the waves can add/subtract
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principle of superposition
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a periodic wiggle in both space and time
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wave
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the high points of a sine wave
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crests
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the low point for a sing wave
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trough
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what is transported through wave motion
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disturbance of motion is transported and not the medium itself
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a wave in which the medium vibrates in a direction perpendicular to the direction in which the wave travels
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transverse wave
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a wave in which the medium vibrates in a direction parallel to the direction in which wave travels
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longitudinal wave
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when the crest of one wave overlaps the crest of anther their individual effects add together to produce a wave of increased amplitude
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constructive interference
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when the crest of one wave overlaps the trough of another, their individual effects are reduced
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destructive interference
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sounds waves with frequencies below 20 hertz
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infrasonic
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sound waves with frequencies above 20000 hertz
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ultrasonic
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a resulting of superposing different waves, often of the same wavelength
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interference
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bending of sound or any wave caused by a difference in wave speed
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refraction
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the classification of electromagnetic waves according to frequency
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electromagnetic spectrum
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the lowest frequency of light visible to human eyes is
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red
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the highest frequency of visible light to human eyes is
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violet
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occurs when the average speed of light changes in going from one transparent medium to another
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refraction
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