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wave tranfers (frequency - number of waves that pass a fixed point in a…
wave tranfers
frequenc
y - number of waves that pass a fixed point in a given amount of time.
wave speed- speed at which a wave travels.
Doppler effect
- increase (or decrease) in the frequency of sound, light, or other waves as the source and observer move toward (or away from) each other.
audible hearing range-commonly stated range of human hearing
ultrasonic( more than 20,000 Hz
infrasonic( less that 20 Hz)
intensity- the power transferred per unit area,
wavelength - distance between successive crests of a wave
antinodes-
the points that undergo the maximum displacement during each vibrational cycle
nodes
- point along a standing wave where the wave has minimum amplitude
energy
mechanical waves- need medium
transverse waves- waves go up and down
standing waves- vibration of a system in which some particular points remain fixed
resonance
- phenomenon in which a small-amplitude driving force could produce large-amplitude motion.
harmonics
- frequency of an oscillation or wave.
longitudinal waves - waves go left to right
sound waves - wave produced by objects that are vibrating. :
refraction
-the change in direction of a wave, caused by the change in the wave's speed.
diffraction
-bending of light as it passes around the edge of an object.
reflection
- he return of light or sound waves from a surface.
decibel
- unit for sound waves
energy
electromagnetic waves- doesn't need a medium to travel
interference- combination of two or more electromagnetic waveforms to form a resultant wave in which the displacement is either reinforced or canceled.
destructive interference-
interference of two waves of equal frequency and opposite phase, resulting in their cancellation
constructive interference-
If the amplitudes of two waves have the same sign they will add together to form a wave with a larger amplitude.
Amplitude - the maximum extent of a vibration or oscillation