Waves Objective I can describe the difference between
![Waves Objective: I can describe the difference between mechanical waves and electromagnetic waves. Waves Objective: I can describe the difference between mechanical waves and electromagnetic waves.](https://slidetodoc.com/presentation_image/5a992d68c0738023a900b0d76029f7ba/image-1.jpg)
Waves Objective: I can describe the difference between mechanical waves and electromagnetic waves.
![What is a wave? A wave is a moving disturbance that transfers energy through What is a wave? A wave is a moving disturbance that transfers energy through](http://slidetodoc.com/presentation_image/5a992d68c0738023a900b0d76029f7ba/image-2.jpg)
What is a wave? A wave is a moving disturbance that transfers energy through matter or space.
![Examples of waves Water waves light waves Sound waves microwaves Examples of waves Water waves light waves Sound waves microwaves](http://slidetodoc.com/presentation_image/5a992d68c0738023a900b0d76029f7ba/image-3.jpg)
Examples of waves Water waves light waves Sound waves microwaves
![Radio waves X-ray waves Ultraviolet waves seismic waves Radio waves X-ray waves Ultraviolet waves seismic waves](http://slidetodoc.com/presentation_image/5a992d68c0738023a900b0d76029f7ba/image-4.jpg)
Radio waves X-ray waves Ultraviolet waves seismic waves
![All of these waves can be put into 2 categories: 1. Waves that do All of these waves can be put into 2 categories: 1. Waves that do](http://slidetodoc.com/presentation_image/5a992d68c0738023a900b0d76029f7ba/image-5.jpg)
All of these waves can be put into 2 categories: 1. Waves that do not require a medium 2. Waves that require a medium
![So what’s a medium? A medium is something through which a wave travels. (solid, So what’s a medium? A medium is something through which a wave travels. (solid,](http://slidetodoc.com/presentation_image/5a992d68c0738023a900b0d76029f7ba/image-6.jpg)
So what’s a medium? A medium is something through which a wave travels. (solid, liquid, or gas!) • In a water wave, the medium is the water. • In a sound wave, the medium is the air. • In an earthquake, the medium is the ground. Does light require a medium?
![Well, where does light come from? If it can travel through NOTHINGNESS, then it Well, where does light come from? If it can travel through NOTHINGNESS, then it](http://slidetodoc.com/presentation_image/5a992d68c0738023a900b0d76029f7ba/image-7.jpg)
Well, where does light come from? If it can travel through NOTHINGNESS, then it doesn’t need a medium
![Back to our 2 groups 1. Electromagnetic waves can transfer energy through a medium Back to our 2 groups 1. Electromagnetic waves can transfer energy through a medium](http://slidetodoc.com/presentation_image/5a992d68c0738023a900b0d76029f7ba/image-8.jpg)
Back to our 2 groups 1. Electromagnetic waves can transfer energy through a medium OR through empty space (a vacuum) – Ex. Radio waves, light waves, infrared waves, ultraviolet waves, x-rays, gamma rays 2. Mechanical Waves are waves that require a medium in order to transfer energy. – Ex. Sound waves, water waves, seismic waves
![Review 1. What is a medium? 2. Do electromagnetic waves require a medium? 3. Review 1. What is a medium? 2. Do electromagnetic waves require a medium? 3.](http://slidetodoc.com/presentation_image/5a992d68c0738023a900b0d76029f7ba/image-9.jpg)
Review 1. What is a medium? 2. Do electromagnetic waves require a medium? 3. Give an example of an electromagnetic wave. 4. Do mechanical waves require a medium? 5. Give an example of a mechanical wave.
![Mechanical wave Electromagnetic wave Mechanical wave Electromagnetic wave](http://slidetodoc.com/presentation_image/5a992d68c0738023a900b0d76029f7ba/image-10.jpg)
Mechanical wave Electromagnetic wave
![Transverse and Longitudinal Waves Objective: I will be able to differentiate between transverse and Transverse and Longitudinal Waves Objective: I will be able to differentiate between transverse and](http://slidetodoc.com/presentation_image/5a992d68c0738023a900b0d76029f7ba/image-11.jpg)
Transverse and Longitudinal Waves Objective: I will be able to differentiate between transverse and longitudinal waves.
![2 different ways to create a wave: 2 different ways to create a wave:](http://slidetodoc.com/presentation_image/5a992d68c0738023a900b0d76029f7ba/image-12.jpg)
2 different ways to create a wave:
![Now lets see these two wave types in action http: //www. acs. psu. edu/drussell/demos/waves Now lets see these two wave types in action http: //www. acs. psu. edu/drussell/demos/waves](http://slidetodoc.com/presentation_image/5a992d68c0738023a900b0d76029f7ba/image-13.jpg)
Now lets see these two wave types in action http: //www. acs. psu. edu/drussell/demos/waves /wavemotion. html
![Let’s look back at the waves Now, when you watch the waves, notice how Let’s look back at the waves Now, when you watch the waves, notice how](http://slidetodoc.com/presentation_image/5a992d68c0738023a900b0d76029f7ba/image-14.jpg)
Let’s look back at the waves Now, when you watch the waves, notice how the particles of the medium are moving in different ways. Note: • Which direction is the wave moving in? • Which direction are the particles moving in? • Are these two directions the same? http: //www. acs. psu. edu/drussell/demos/wavemotion. html
![Longitudinal Waves In a longitudinal wave, the particles of the medium vibrate in the Longitudinal Waves In a longitudinal wave, the particles of the medium vibrate in the](http://slidetodoc.com/presentation_image/5a992d68c0738023a900b0d76029f7ba/image-15.jpg)
Longitudinal Waves In a longitudinal wave, the particles of the medium vibrate in the same direction as (or parallel to) the direction that the wave is travelling
![Longitudinal waves (where particles move parallel to the direction of the wave) are something Longitudinal waves (where particles move parallel to the direction of the wave) are something](http://slidetodoc.com/presentation_image/5a992d68c0738023a900b0d76029f7ba/image-16.jpg)
Longitudinal waves (where particles move parallel to the direction of the wave) are something you experience every day in the form of SOUND!
![](http://slidetodoc.com/presentation_image/5a992d68c0738023a900b0d76029f7ba/image-17.jpg)
![Transverse Waves In a transverse wave, the particles of the medium vibrate in the Transverse Waves In a transverse wave, the particles of the medium vibrate in the](http://slidetodoc.com/presentation_image/5a992d68c0738023a900b0d76029f7ba/image-18.jpg)
Transverse Waves In a transverse wave, the particles of the medium vibrate in the opposite direction of (or perpendicular to) the direction that the wave is travelling
![Transverse waves (where the particles move perpendicular to the direction of the wave) are Transverse waves (where the particles move perpendicular to the direction of the wave) are](http://slidetodoc.com/presentation_image/5a992d68c0738023a900b0d76029f7ba/image-19.jpg)
Transverse waves (where the particles move perpendicular to the direction of the wave) are also all around you in the form of LIGHT!
![Review 1. In a ______ wave the particles of the medium vibrate PERPENDICULAR to Review 1. In a ______ wave the particles of the medium vibrate PERPENDICULAR to](http://slidetodoc.com/presentation_image/5a992d68c0738023a900b0d76029f7ba/image-20.jpg)
Review 1. In a ______ wave the particles of the medium vibrate PERPENDICULAR to the direction the wave is travelling. 2. In a ______ wave the particles of the medium vibrate PARALLEL to the direction the wave is travelling. 3. Sound is an example of a ____ wave. 4. Light is an example of a ____ wave.
![Transverse Wave Longitudinal Wave Transverse Wave Longitudinal Wave](http://slidetodoc.com/presentation_image/5a992d68c0738023a900b0d76029f7ba/image-21.jpg)
Transverse Wave Longitudinal Wave
![Wave Parts Objective: I will be able to identify and label the main parts Wave Parts Objective: I will be able to identify and label the main parts](http://slidetodoc.com/presentation_image/5a992d68c0738023a900b0d76029f7ba/image-22.jpg)
Wave Parts Objective: I will be able to identify and label the main parts of a wave.
![Wavelength The distance between one point on a wave and the exact same point Wavelength The distance between one point on a wave and the exact same point](http://slidetodoc.com/presentation_image/5a992d68c0738023a900b0d76029f7ba/image-23.jpg)
Wavelength The distance between one point on a wave and the exact same point on the next wave
![Amplitude The maximum extent of vibration or the distance from the resting position of Amplitude The maximum extent of vibration or the distance from the resting position of](http://slidetodoc.com/presentation_image/5a992d68c0738023a900b0d76029f7ba/image-24.jpg)
Amplitude The maximum extent of vibration or the distance from the resting position of the medium to the crest or trough
![Frequency The number of waves produced in a given amount of time Frequency The number of waves produced in a given amount of time](http://slidetodoc.com/presentation_image/5a992d68c0738023a900b0d76029f7ba/image-25.jpg)
Frequency The number of waves produced in a given amount of time
![Crest and trough The highest/lowest point of a transverse wave Crest and trough The highest/lowest point of a transverse wave](http://slidetodoc.com/presentation_image/5a992d68c0738023a900b0d76029f7ba/image-26.jpg)
Crest and trough The highest/lowest point of a transverse wave
![Compression and rarefaction The squished up or spread out parts of a longitudinal wave Compression and rarefaction The squished up or spread out parts of a longitudinal wave](http://slidetodoc.com/presentation_image/5a992d68c0738023a900b0d76029f7ba/image-27.jpg)
Compression and rarefaction The squished up or spread out parts of a longitudinal wave
![Review 1. Draw a transverse wave and label – – Wavelength Amplitude Crest Trough Review 1. Draw a transverse wave and label – – Wavelength Amplitude Crest Trough](http://slidetodoc.com/presentation_image/5a992d68c0738023a900b0d76029f7ba/image-28.jpg)
Review 1. Draw a transverse wave and label – – Wavelength Amplitude Crest Trough
![Review, continued 2. Draw a longitudinal wave and label – Wavelength – Compression – Review, continued 2. Draw a longitudinal wave and label – Wavelength – Compression –](http://slidetodoc.com/presentation_image/5a992d68c0738023a900b0d76029f7ba/image-29.jpg)
Review, continued 2. Draw a longitudinal wave and label – Wavelength – Compression – rarefaction
![Practice 1 Practice 1](http://slidetodoc.com/presentation_image/5a992d68c0738023a900b0d76029f7ba/image-30.jpg)
Practice 1
![Practice 2 Practice 2](http://slidetodoc.com/presentation_image/5a992d68c0738023a900b0d76029f7ba/image-31.jpg)
Practice 2
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