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Waves (Electromagnetic Waves (produced by constantly changing fields…
Waves
Electromagnetic Waves
produced by constantly changing fields
alternating waves/fields at right angles
Varying wavelength/frequency
can travel through empty space and matter
Electromagnetic Radiation
Speed of Light
Produced when electric charge vibrates/accelerates
Acts like Wave and Stream of Particles
Intensity decreases when travelling further
Mechanical Waves
A disturbance in matter that carries energy
One place to another
Transverse waves
Causes medium to vibrate at right angles
Towards the direction of the wave
shaking crumbs off a picnic blanket
Longitudinal waves
vibration of medium is parallel to direction of wave
P waves from earthquakes
Surface waves
Travels along a surface separating 2 media
Fishing bobber, floats in a circle
Require matter to travel through, called a medium
Created when source of energy causes a vibration to travel through a medium
Properties
Wavelength
Distance between waves
meters
Wave speed
meters per second
Frequency
always same amount of time between each wave
Hertz
Amplitude
maximum displacement of medium from rest position
more energy=greater amplitude