Refraction- The bending of a wave as it enters a new medium at an angle.
Ex.) A lawnmower turns when it is pushed at an angle from grass to gravel.
Ex.) As an ocean wave approaches the shore at an angle, the wave bends or refracts, because one side of each wave front slows down before the other side does.
the direction of the lawnmower changes because one wheel enters the gravel before the other one does. The wheel is still moving at a faster speed on the grass.
Speed difference between the two wheels causes the lawnmower to change direction.
when a wave enters a meduim at an angle, refraction occurs because one side of the wave moves more slowly than the other side.
Reflection: occurs when a wave bounces off of a surface that is can not pass through.
in the video the dotted line can not pass through the surface so it bounces off.
Ex) a shadow in a pool is an example off reflection because the light from the sun bounces off and shows te reflection of whatever is by the pool.
Standing Waves
is a wave that appears to stay in one place it does not seem to move through the medium
a standing wave form only if half a wavelength or a multiple of a half wavelength fits exactly into the length of vibrating cord
Diffraction
Diffraction is when a wave is bent around an object that passes into a narrow opening.
A wave will diffract more if the wavelength is larger compared to the size of the opening or obstacle. If there is a small obstacle the wave will bend very little. Diffraction is most common in water and liquids. Waves hitting an ocean rock would be an example of diffraction.
Interference:
occurs when 2 or more waves overlap and combine together.
there are two different types of interference, constructive and destructive.
Constructive
occurs when 2 or more waves combine to produce a wave with a larger displacement.
Destructive
this type occurs when 2 or more waves combine to produce a wave with a small displacement.
in simpler words the waves cancel eachother out to form a smaller wave.
17.3 Behavior of Waves
Refraction- The bending of a wave as it enters a new medium at an angle.
- Ex.) A lawnmower turns when it is pushed at an angle from grass to gravel.
- Ex.) As an ocean wave approaches the shore at an angle, the wave bends or refracts, because one side of each wave front slows down before the other side does.
- the direction of the lawnmower changes because one wheel enters the gravel before the other one does. The wheel is still moving at a faster speed on the grass.
- Speed difference between the two wheels causes the lawnmower to change direction.
- when a wave enters a meduim at an angle, refraction occurs because one side of the wave moves more slowly than the other side.
Reflection: occurs when a wave bounces off of a surface that is can not pass through.- http://id.mind.net/~zona/mstm/physics/light/rayOptics/reflection/reflection1.html
- in the video the dotted line can not pass through the surface so it bounces off.
- Ex) a shadow in a pool is an example off reflection because the light from the sun bounces off and shows te reflection of whatever is by the pool.
Standing Waves- is a wave that appears to stay in one place it does not seem to move through the medium
- a standing wave form only if half a wavelength or a multiple of a half wavelength fits exactly into the length of vibrating cord
DiffractionDiffraction is when a wave is bent around an object that passes into a narrow opening.
A wave will diffract more if the wavelength is larger compared to the size of the opening or obstacle. If there is a small obstacle the wave will bend very little. Diffraction is most common in water and liquids. Waves hitting an ocean rock would be an example of diffraction.
Interference:
- occurs when 2 or more waves overlap and combine together.
- there are two different types of interference, constructive and destructive.
ConstructiveDestructive