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waves waves and more

8th grade-waves, sound waves and light waves

QuestionAnswer
wave A rhythmic disturbance that transfers energy from one place to another. Energy is required to make a wave
wavelength the distance between a point on one wave and the identical point on the next wave
amplitude the greatest distance a wave rises or falls from its resting position (or height of the wave
transverse wave Matter moves at right angles to the direction the wave travels (like a rope)
wave frequency count of the number of waves that passes a given point in one second
sound wave compressional wave/ longitudinal wave. needs vibration and medium
compressional wave Longitudinal wave, matter vibrates in the same direction as the wave (compressed spring)
velocity of wave velocity = wavelength x frequency speed of wave
Volume loudness depends on amplitude of the wave. the louder =greater amplitude
decibel measure of volume
pitch high or low a sound is heard by our ears. depends on how many times the air vibrates per one second
The Doppler Effect a change in wave frequency caused by the motion of the sound source or the motion of the observer.
interference the ability of two or more waves to combine together to form a new wave
Crest top of a wave (highest part of the wave)
trough bottom of wave (lowest part of wave)
longitudinal wave energy moves in the same direction as the save travels
rarefaction particles least dense, trough of the longitudinal wave
Hertz Hz units for frequency of wave (waves per second
compression particles most dense, crest of longitudinal wave
reinforcement compression of sound wave match amplitude and volume increase
cancellation compressions don't match, decreases amplitude and volume
ROYGBIV the only part of the visible spectrum that humans can see,
White light is refracted... it is broken up into all of the wave lengths of visible light (ROYGBIV)
White light is made of all of the wavelengths of the visible spectrum ROYGBIV
Transparent an object that lets all light pass through it
translucent an object that lets some light pass through it
opaque an object that lets no light pass through it.
refraction the bending of light due to a change in the speed (BENDS)
Electromagnetic spectrum transverse waves arranged by their different wavelengths. Longest waves to short wavelengths
Frequency measure waves per second , units Hertz
high frequency short wavelengths closer together
low frequency longer wavelengths more spread out
light colors reflect light
dark colors absorb light
reflection bouncing back of a wave
sound a form of energy produced by vibrations, longitudinal wave
Convex lenses object appears larger
Concave lenses Object appears smaller
Created by: lockwoodscience