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waves waves and more
8th grade-waves, sound waves and light waves
Question | Answer |
---|---|
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 |