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38 Cards in this Set
- Front
- Back
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wavelength
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Distance for one wave from chrest to chrest or trough to trough
Measured in meters |
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Period
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time for one wave to tkae place
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frequency
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how often a wave occurs in waves per seond
measured in Hertz and determined by the source |
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amplitude
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hieght of the wave measured at the middel point
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chrest
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top of a wave
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trough
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bottom of a wave
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transverse wave
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looks like a snake
ex-light |
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longitudinal wave
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rough picture-->lllll l l l llllll l l l l
close together parts are crests and farther apart are troughs Ex- sound |
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speed of light
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3.0x10^8 m/s
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speed of sound
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343 m/s
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types of electromatic waves
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Gamma
X-rays infrared visible light ultra violet microwaves radio waves |
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mechanical wave
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wave that needs a medium
ex-sound |
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red shift
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objects moving away the light spreads apart and looks red
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blue shift
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object moving towards you stack together and look blue
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doppler effect
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When sound waves are moving towards you and the sound waves stack together and sound higher than spread apart as it moves away sounding lower
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interference
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two waves that meet at the same time
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constructive interference
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when waves meet chrest on chrest and combine
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destructive interference
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when waves meet chrest on trough and cancle each other out
Ex-theater dead spots |
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diffraction
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the bending of waves around corners
Ex- sound, when someone yells on the other side of a corner you can hear them |
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refraction
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bending of light when traveling from one material to another
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harmonics
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the types of waves an instrument can hold
EX- guitar (closed closed) flute (open open) clarient (closed open) |
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sympathetic vibration
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when something vibrating causes another object with same natural frequency to vibrate
EX- a tuning fork causing a tuning fork of the same note to vibrate just from the air |
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natural frequency
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the way something want to vibrate
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what makes a tuning fork a low or high note?
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The length
short=high note long=low note |
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are radio waves ligth or sound?
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light
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how are pitch and frequency related?
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pitch is how we hear and measure frequency
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forced vibration
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when you force something to vibrate at a frequency that is not it's natural frequency
Ex- tuning fork making the table vibrate |
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what is a light year?
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the amount of distance light travels in a year
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what three colors of light are used by the human eyes to make all the colors of the spectrum?
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Red, Blue, and Green
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what are the complimentary colors?
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Colors made by mixing red green and blue
EX- cyan, yellow and magenta |
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what colors are refracted and absorbed by a yellow object?
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red and green are reflected while blue is absorbed
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which colors make it through a yellow stain glass window
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red and green make it through while blue is blocked
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what is snell's law used for?
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the find the angle of refraction
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what is the center of a mirror?
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twice the focal point
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what is the center of a lense?
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the middle of the lens itself
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properties of a convex mirror
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always upright, virtual, and smaller
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properties of a concave mirror
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less than the focal point it is upright enlarged and virtual
more than the focal point it is smaller, real, and inverted |
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what determines if a ray refracts or reflects?
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The angle it exits one material and into another
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