wave disturbance that carries energy through matter or space medium matter through which a wave travels the physical environment in which phenomena occur mechanical wave wave that requires a medium through which to travel ID: 651158
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Slide1
Chapter 15.1 – Types of Waves
wave –
disturbance that carries energy through matter or space
medium –
matter through which a wave travels
the physical environment in which phenomena occur
mechanical wave –
wave that requires a medium through which to travel
ex. Slide2
Chapter 15.1 – Types of Waves
electromagnetic wave –
wave made of changing electric and magnetic fields in space
do not require a medium
ex.
the bigger a wave is, the more energy it carries
waves spread out in circles called wave fronts
as the wave spreads out the energy is spread out tooSlide3
Chapter 15.1 – Types of Waves
most waves are caused by vibrating objects
the energy of a mass vibrating on a spring changes form
pull down to gain elastic potential energy
as it moves up the elastic potential energy converts to kinetic energy
at its maximum compression the spring has elastic and gravitational potential energy
as the spring moves down it converts the energy to kinetic energySlide4
Chapter 15.1 – Types of Waves
a mass vibrating through its rest position is called simple harmonic motion
damped harmonic motion –
vibration that fades as energy is transferred from one object to another
- particles vibrate like a mass on a springSlide5
Chapter 15.1 – Types of Waves
transverse wave –
wave in which the particles of the medium move perpendicularly to the direction the wave is traveling
wave moves to the right, the particles vibrate up and down
ex. electromagnetic waves
, seismic waves
longitudinal wave –
wave in which the particles of a medium vibrate parallel to the direction of wave motion
the wave compresses and expands the medium
ex. sound waves, spring wavesSlide6
Chapter 15.1 – Types of Waves
crest –
highest point of a transverse wave
trough –
lowest point of a transverse wave
compression –
compressed area of a longitudinal wave
rarefaction –
stretched out area of a longitudinal waveSlide7
Chapter 15.1 – Types of Waves
surface wave –
wave in which the particles move both perpendicular and parallel to the direction of wave motion
particles move in an ellipse or circle
surface waves only occur at the boundary of two mediums
ex. water waves between air
and water