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Published byChristian Glenn
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What do these pictures have in common?
2 Introduction to Waves
3 Waves are everywhere in nature Sound waves visible light waves radio waves microwaves water waves telephone chord waves stadium waves earthquake waves waves on a string slinky waves
4 What is a wave? A wave is a disturbance (source of energy) that travels through a medium from one location to another. A wave is the motion of a disturbance
Waves transfer energy not matter. The water waves below are carrying energy but are not moving. Waves can only exist as they have energy to carry.
Mechanical Waves Waves that require a medium to pass through. A medium is a material through which waves can pass Gases (air) Liquids (water) Solids (ropes) 6
What are two kinds of mechanical waves? Transverse Longitudinal (Compression) 7
Transverse Waves A disturbance that is perpendicular to the direction of the wave Ex. Moving a rope up and down. disturbance wave direction 8
Example of a transverse wave:
Longitudinal (Compression) Wave The disturbance is parallel to the direction of the wave travel. Ex. Spring toy or SLINKY! Compression-the coils come together Rarefaction- the coils spread out 11
Example- Longitudinal Wave 12
13 Longitudinal vs. Transverse Waves The differences between the two can be seen
Properties of Waves Crest and Trough Amplitude Wavelength Frequency 14
Crest and Trough Crest-The highest part of a transverse wave Trough- The lowest part of a transverse wave 15
Amplitude-Transverse Wave 16
Amplitude- Longitudinal Wave Depends on how dense (bunched) the medium is at each compression. Coiled spring A has the greater amplitude. 17
Wavelength The distance between two corresponding parts of a wave. Crest to Crest Trough to Trough 18
Frequency The number of complete waves that pass a given point in a certain amount of time. Measured in hertz (Hz) 19 HIGH Frequency LOW Frequency
Review 1.Identify two types of mechanical waves. 1.What is amplitude? 1.If a wave has a high frequency, do the wavelengths become shorter or longer? 20
Ch. 10 – Waves & Sound I. Characteristics of Waves Waves
Ch Waves & Sound I. Characteristics of Waves Waves
Waves Chapter 11 Section 1.
Ch Waves & Sound I. Characteristics of Waves Waves Transverse waves Longitudinal waves Measuring waves.
KWL Chart on WAVES What I KNOW What I WANT to know What I LEARNED.
Ch. 17 – Mechanical Waves & Sound
Energy in Waves. A Wave is… Any disturbance that transmits energy through matter or space. Energy in Waves.
What is a Wave? Sound and Light are forms of energy that travel in waves A wave is a repeating disturbance or movement that transfers energy through matter.
UNIT 3. What is a Wave? Definition: A disturbance that transfers energy from place to place. What carries waves? A medium, a medium is the material through.
Waves Introduction Chapter 10 Section 1 and 2 Physics Standard 4.
Chapter 11 Waves.
The Nature of Waves What is a wave? A wave is a repeating disturbance or movement that transfers energy through matter or space Waves transfer energy.
1 Vibration: A repeated back-and-forth or up-and-down motion. Energy: The ability to do work.
Essential Question: How does data collected provide evidence that the amount of energy a wave carries determines the properties of a wave?
What are Waves? A wave is a disturbance that transfers energy from place to place. Energy – the ability to do work The material through which a wave travels.
Wave Properties Students will be able to Explain wave structure Contrast transverse and longitudinal waves Describe properties of a wave.
MAY 12, 2014 Homework: Read pages (Stop at Longitudinal Wave) in Sound and Light textbook- Define bold terms. -Unit vocabulary sheet due Friday Do.
What are waves? a disturbance that transfers energy from place to place. Classified as either 1. Mechanical- require a medium 2. Electromagnetic- do not.
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