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Mechanical Waves IMG_0217 (Properties of Mechanical Waves (Wave Speed…
Mechanical Waves
mechanical waves
disturbance in matter
carries energy from one place to another
created when source of energy
causes a vibration
vibration travels through a medium
Types of Mechanical Waves
Transverse Waves
causes waves to vibrate
perpendicular to the direction of the wave
carries energy from left to right
while the motion of the wave is up and down
example
shaking a blanket up and down
Longitudinal Waves
forms coils
medium spread out - rarefraction
where medium is close it is called compression
vibration of medium
parallel to direction of wave
P waves
produced by earthquakes
primary waves
can travel through Earth's interior
type of longitudinal waves
Surface Waves
wave travels along a surface
example
ocean waves
travels between water and air
carries anything floating on it
towards the shore
travels along two separating mediums
waves moves in circular motion
moves up and down/ back and forth
Properties of Mechanical Waves
frequency and period
periodic motion
repeats in intervals
frequency
number of complete circle
in an amount of time
waves
number of waves
that pass in a given time
hertz
cycles per second
Hz
waves frequency =
frequency of vibrating source
Wavelength
distance between
two parallel point on a wave
more frequency
wavelength decreases
Wave Speed
Speed= Wavelength*Frequency
distance/time
1 Hz=1/s
constant speed=
wavelength is inversely proportionally to frequency
Amplitude
maximum displacement
from its rest position
more energy=
greater amplitude
Electromagnetic Waves
Electromagnetic Waves
doesn't need matter to travel
produced by
vibration of charged particles
behaves like waves or particles
