WAVES
Characteristics of WAVES
What is a WAVE? ___________ Disturbance that travels through a medium
What is a disturbance? ________movement from rest____.
Waves DO NOT Carry? ____matter______________________.
Waves Carry? __________energy_______________________________________.
Where do WAVES get their Energy From?
VIBERATION: ____movement around the resting point________.
An object that is vibrating is: _moving______.
If an object is moving it has: _____energy_________.
A vibrating object off some of its energy to ___paarticles___
causing them _____to move_________________________.
WAVES get there energy from? ___a force _____.
Waves through Matter and Space:
MEDIUM: ________ matter or a substance that carries a wave or can transfer energy
MEDIUMS INCLUDE: Solid, Liquid, Gas
VACCUUM: ___ volume of empty space. No matter (outer space)___________
TWO TYPES OF WAVE
Mechanical: _ requires a medium to travel through… ocean, or sound __________
Electromagnetic: _____ no medium required/ light, x-ray _
Draw a sine wave:
__________________________________________
Draw a cosine wave
___________________________________________
WAVES
All WAVES contain:
1._____amplitude________
2.___Wavelength____
3.____frequency _
Crest
trough
rest
amplitude
wavelength
X- Axis: __resting point, or equilibrium___________________.
Crest: _____maximum point from rest_________________.
Trough: ______minimum point from rest__________________________.
Amplitude: _____height from rest to crest. shows energy level_______.
Can be determined: __________________________________________________.
Wavelength: _____ length (distance) of one complete wave cycle ___________.
What is lambda? and draw __The symbol for wavelength ___
Frequency: __ number of repeating waves per second. (wavelength/ second)____.
One Complete Wave: _____________________________________________________________.
UNITS: ____Hertz (Hz)_______________________.
WAVES
All waves transfer energy, but their movement through different mediums is not
the same. Depending on the motion of the wave as compared to the motion of the
medium waves are classified either Transerverse or longitudinal
1. TRANSVERSE WAVE - particles of the medium are displaced in a direction perpendicular to
the direction on energy_______.
Particle Motion: _____up/ down____
Wave Motion: ____left/ right___
2. LONGITUDINAL WAVE - particles are displaced in a direction that is parallel to the direction
of energy transport
Particle Motion: __left, right
Wave Motion: ______left-right__
Compression: __ medium is traveling at maximum density (pushing force)_______
Rarefaction: ____ traveling at minimum density ____________
WAVES
The speed of waves depends upon the medium through which it travels. The two
factors are Frequency and wavelength
SPEED wavelength x frequency
UNITS = _____m/s_______
Directions: Use the formula above to calculate the missing information. You must
show the formula, substitution and answer with correct units.
FREQUENCY
(Hz)
WAVELENGTH
(m)
150
2
25
250
40
500
1500
8
75
100
SPEED
(m/s)
15
4000
WAVES
1. INTERFERENCE: _two
or more waves arrive at the same place at the same
time
A. CONSTRUCTIVE INTERFERENCE: wave combine in such a way
that the disturbance that results is greater than either force
WAVES COMBINE BY: ______the addition of the two waves
_________.
RESULT: ______a greater amplitude
waves combine is such a way that the
disturbance that results is less than either wave alone
WAVES COMBINE BY: ____subtracting from each other________
B. DESTRUCTIVE INTERFERENCE:
RESULTS: ________wave may cancel out or the amplitude will be less____.