Some of the pictures are in gif format. Yeah, they move:) :D

1. W
AVES
Kinds and Properties

2. W
hat are W
AVES?



W
ave is propagation of disturbance through a
medium or space by which energy is
transferred.
A single unrepeated disturbance is called wave
pulse.
A succession of periodic disturbance
is called wave train.

3. Kinds of W
aves

-

-
According to the direction of motion
transverse wave
longitudinal waves
According to the presence of medium
mechanical waves
electromagnetic waves

4. Transverse W
aves

are waves in which particles move in a
direction perpendicular to the direction
of the waves

5. Longitudinal W
aves

are waves in which particles move in the
direction parallel to the direction of the
waves.

6. Mechanical W
ave



requires a medium for the transport of energy
medium can be in solid, liquid or gaseous
state
examples: sound waves, earthquake/
seismic
waves, tidal waves

7. Electromagnetic W
ave
can transmit energy without material or
medium
 can move in an empty space
 examples: light waves, radio waves


8. Electromagnetic W
ave

9. Electromagnetic W
ave

10. Amplitude


Is the max distance that a wave will travel
away from the rest position
Example, p. 12


In transverse waves the amplitude is measured
by the up and down motion (crest and trough)
In longitudinal waves the amplitude is measured
by how compressed or rarefied the medium is
(more compressions, the stronger the wave)

12. Wavelength

The distance between two corresponding
parts of a wave is its wavelength


Transverse waves are measured from crest to
crest or trough to trough
Longitudinal are measured by the length of the
compressions

14. Frequency



Is the number of complete waves that pass a
given point in an amount of time
Frequency can be increased and decreased
Frequency is measured in hertz


Hertz are measured by waves per second
Example, if a wave passes through a point on a
rope 2 times in one second, it would have a
frequency of 2 Hz

15. Speed

Speed, wavelength, and frequency are all
related


Speed = Wavelength x Frequency
If you know two of the quantities in this
formula you can solve for the other (just like
Ohm’s law)


Frequency = Speed/Wavelength
Wavelength = Speed/Frequency