* WAVES
** OBJECTIVES
1. Describe the nature of waves
2. Appreciate the importance of waves in disaster science
3. Simulate waves using pHET 
** CONTENT
A  wave is  any disturbance  that moves  through matter  or
space  and  transfers energy  from  one  specific place  to
another.

There are two types of waves

*** MECHANICAL WAVE
These require  a medium or a  matter of in order  to ravel,
Mechanical  waves are  created  when the  molecules in  the
medium  collide  and the  energy  is  transferred from  one
molecule to another

Basically,  they  need some  sort  of  matter in  order  to
travel.

**** TRANSVERSE
A transverse waves causes the particles in matter to move
at a right angle or perpendicular to the direction of the
waves

in order to generate a transverse with a slingky, you need
to move it up and down

To make this  simple, this is a wave vibrating att rightt
angles to tthe direction of its propagation

**** LONGITUDINAL
The second type of mechanical wave is known as longitudinal
wave or compressional wave

The motion  of the medium  is parallel to the  direction of
the waves.  The particles  of the medium  move in  the same
direction in which the wave moves

*** ELECTROMAGNETIC WAVE
These  can travel  through an  empty space,  Elecromagnetic
waves are produced  by the motion of  charged particles and
the  transition  of  electrons between  the  energy  levels
within atoms and radioactive nuclei

Basically  we dont  need some  sort of  matter in  order to
travel,

Examples of these are  wifi, bluetootch, xrays, gamma rays,
radio, microwaves, etc

*** PARTS
**** CREST
The crest is the high points of the wave

**** TROUGHS
The throughs is the low points of a wave

**** AMPLITUDE
The maximum displacement  of the rest position  to the high
point of the wave.

If you have a high point of  a wave, it has alot of energy,
the opposite if is a low point

**** SEA LEVEL
The undisturbed position  of the matter, its not  a part of
the wave

**** WAVE HEIGHT
Distance between the highest point to the lowest point

**** WAVELENGTH
The distance  of two points in  a wave thats moving  in the
same speed and same distance

Represented by the word "lambda"