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Wave energy images

Waves

 

What are waves?

What are the different types of waves?

What do they do?

 

 

 

Waves are disturbances that travel through space and transfer energy often without any permanent movement of the media (mass).

There are three major types of waves.  Lets grab slinkies and discover them...

 

 

I am sure you found Transverse waves:

Image result for types of waves, transverse

The medium the wave passes through goes transverse (perpendicular) to the direction the wave travels.  

The electromagnetic spectrum (light) travels in these sorts of waves.

Notice the parts of the wave: crest, trough, amplitude, and wavelength.

 

Did you find Longitudinal waves:

Image result for types of waves, longitudinal

Notice the parts of these waves: rarefaction and compression.  They also have an amplitude (how big the compression is) and a wavelength (how far between compressions), but they are a little harder to see.

 

 

Much harder to find are Rayleigh and Love waves:

Image result for types of waves rayleigh, love

The medium moves in circles or spirals relative to the direction of the energy movement.

Water moves in Rayleigh waves.

 

 

The important parts of a wave are:

Wavelength - this is the distance from one crest to the next crest (or trough to trough).  This determines so much about the wave!  It is the difference detween radio waves, X-rays, and visible light!  It is the pitch that you hear.  This is related to frequency and period.

Amplitude - this is the height of the wave and determines how much energy the wave transmits (how loud the noise or bright the color).


A wave's period is the amount of time is takes for one wave to move past a spot.

A wave's frequency is the number of waves that move past a spot in a unit of time.

 

 

When a wave hits an object, it may reflect off it:

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It bounces off at the same angle it hits.

Image result for wave reflection

If the reflecting surface is fixed, the reflection is reversed.

 

Image result for wave reflection

 

The waves direction can also bend.  This is called refraction and happens when the wave goes into a different medium:

Image result for wave refraction

This can cause some cool effects.

Image result for wave refraction

 

 

When two waves hit each other, they interfere depending on how they waves line up:

Image result for wave interference

Image result for wave interference

This can cause some really cool effects.

Image result for wave interference

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If the source of the waves were to move, the waves' wavelengths would get shortened at the front and lengthened at the rear.  This is called the Doppler Effect:

Image result for doppler effect

 

This is more pronounced the faster the moving object.

Image result for doppler effect sound barrier

 

 

Light:

Image result for electromagnetic spectrum

 

Sound:

Image result for sound waves

 

Water:

Image result for water waves

 

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