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Waves 20180314_124401 (Electromagnetic waves (transverse waves 20180314…
Waves
Mechanical waves
transverse waves
vibrates at right angles to direction
eg. shaking a blanket
longitudinal waves
vibration is parallel to direction
eg. waves in springs, P waves
surface waves
travels along surface separating 2 media
eg. ocean waves
Electromagnetic waves
transverse waves
changing electric/magnetic fields
created by vibrating charges
travel through space/matter
speed: 3*10^8 mps
Properties of mechanical waves
frequency
time for 1 cycle
hertz=cycles per second
greater frequency=smaller wavelength
Speed=wavelength*frequency
amplitude
max displacement from medium to rest position
Differences
mechanical: travels through matter
produced by medium
electromagnetic: matter/vacuum
produced by electric charges
