Chapter 24
 Wave


A disturbance that
moves through
matter or space
Carry Energy from
one place to
another

Mechanical

Transverse


Compressional


Particles move back and
forth at right angles (like
a jump rope)
Particles move back and
forth along the same
direction (like a spring)
Electromagnetic

Move through matter or
space

Light, Radio Waves, XRays
 Wavelength

Distance between 2
points on a wave
 Frequency

The number of
wavelengths per
second
 Amplitude

Transverse

Half the distance
between the crest and
trough of a wave
The more energy a wave carries, the
larger its amplitude
 Law

of Reflection
The angle of the
reflection always
equals the angle of
incidence (the
normal)
 Refraction

The change in
direction of a wave
when it changes
speed
 Diffraction


The bending of
waves around an
object
Depends on the size
of the object the
wave encounters
 Compressional
Waves
 Can only travel
though matter
 Transferred by the
collision between
the particles the
waves are
traveling through
 Sound
waves
travel faster
through solids and
liquids
 Speed of Sound
increases as
temperature
increases
 Intensity



Amount of energy
carried by a wave
Greater amplitude =
Greater intensity
Measured in
decibels (dB)
 Frequency
The number of waves
per second
 Measured in hertz
(Hz)

 Pitch
The human
perception of the
frequency of sound
 Low frequencies=low
pitch
 High frequencies=high
pitch

 Outer
Ear
Visible part of the ear
 Shaped like a funnel

 Middle
Ear
Sound Amplifier
 Contains the hammer,
anvil, and stirrup

 Inner

Ear
Contains the cochlea


Filled with fluid
Lined with cilia (hair
like cells)
 Reverberation

Repeated echoes
 Echolocation

The process of
locating objects by
bouncing short,
high-frequency
sound waves
towards a certain
area
 Electromagnetic
Waves

Waves that can
travel through
matter or through
empty space
 Speed

of Light
300,000 km/s
 The
complete range of electromagnetic wave
frequencies and wavelengths
 Contains radio waves, microwaves, infrared
waves, ultraviolet waves, x-rays, and gamma
waves
 All are the same type of wave. Differ only in
frequency, wavelength, and energy
 The
color of light depends on the wavelength
 Violet has the shortest wavelength
 Red has the longest wavelength
 White is the combination of all colors
 In Order from longest to shortest:

Red, Orange, Yellow, Green, Blue, Indigo, Violet