Waves
A wave is a disturbance that carries ___________ through matter or space.
It does not move ___________.
Energy may _________________ as a wave travels.
Types of Waves
Mechanical Waves – waves that require a ____________
A medium is a __________ that the wave moves through.
Stone thrown in a pond
Sound from a stereo
_____________
Electromagnetic Waves – waves that _____________ require a medium
Light through _________
Radio waves
____________
Transverse waves – waves in which the motion of the particles is
_______________ to the motion of the wave.
Waves in a rope
Longitudinal waves – waves in which the motion of particles is ____________
to the direction of the wave
Sound waves
Characteristics of Waves
Wavelength – the ____________ between two similar points on a wave
Amplitude – measured the amount of particle vibration or the ___________ of
the wave – half the height of the wave.
Frequency – measures the ________ of vibrations
As frequency increases the wavelength decreases.
Electromagnetic Spectrum
The electromagnetic spectrum shows all the different types of electromagnetic
waves (_______________).
The __________ the frequency, the ________ energy it has.
They all travel at the speed of ___________.
Wave Speed
The speed of a wave depends on the ______________ it is passing through.
The __________ the material, the ___________ a mechanical wave will move
through it (sound travels 3 – 4 times faster through water than air)
Example: Door, Train Tracks
A dense material will _____________ an electromagnetic wave (light
travels slower through glass than air)
____________ waves travel fastest through solids and slowest through gasses.
____________ waves travel fastest through gasses and slowest through solids.
Doppler Effect
The Doppler effect is a __________ in the observed ___________ of a wave
resulting from the __________ of the source or observer
Waves are ______________ as the sound source comes ____________ you
producing a _________ pitched sound. When it travels away the waves are
___________ apart producing a __________ pitched sound
This occurs in both ______________________.
Police car approaching you
Police car driving past you
Characteristics of Waves
Higher the frequency the greater the energy.
Lower the frequency the lower the energy.
Human hearing:
20 Hz to 20,000 Hz
Dog hearing:
40 Hz to 46,000 Hz