Properties of Waves.  Since the waves move back and forth objects move up and down. Imagine riding a water wave. You move up and down because the wave.

Slides:



Advertisements
Similar presentations
Chapter 14 Waves.
Advertisements

Learning Goals: Define wavelength, frequency, period, and amplitude. Describe the relationship between frequency and wavelength. Explain how a wave’s energy.
KWL Chart on WAVES What I KNOW What I WANT to know What I LEARNED.
What do these pictures have in common?. 2 Introduction to Waves.
Mechanical Waves.
WAVES Definition: A traveling disturbance that carries energy through matter and space Waves transfer energy without transferring matter. Waves are produced.
Wave Notes.
Ch. 17 – Mechanical Waves & Sound
Waves Chapters 11, 12, 13. CH 11-1 The Nature of Waves  wave: repeating disturbance or movement that transfers energy through matter or space  Figure.
Chapter 10 Sect. 1 The Nature of Waves. Wave—a repeating disturbance or movement that transfers energy through matter or space Ex: ocean waves (resulting.
Wave Basics Unit 9 – Lecture 1.
Energy in Waves. A Wave is… Any disturbance that transmits energy through matter or space. Energy in Waves.
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. What is a wave? A wave is a repeating disturbance or movement that transfers energy through matter or space.
WAVES. The Nature of Waves A. Wave - a repeating disturbance or movement that transfers energy through matter or space. 1. Molecules pass energy on to.
Waves Introduction Chapter 10 Section 1 and 2 Physics Standard 4.
Chapter 11 Waves.
Waves Chapter 10. The Nature of Waves wave: repeating disturbance or movement that transfers energy through matter or space -examples: light, ocean, sound,
The Nature and Properties of Waves Section 11.1 & 11.2.
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.
Parts of waves. 2 Parts Transverse Wave  1) Crest – high point of wave  2) Trough – low point of wave.
What are waves? a disturbance that transfers energy from place to place. Classified as either 1. Mechanical- require a medium 2. Electromagnetic- do not.
Ms. Barlow’s 8 th Grade Physical Science Class. Waves can differ in how much energy they carry and in how fast they travel. Waves also have other characteristics.
Physical Science 8 th Grade Waves A wave is a rhythmic disturbance that transmits ENERGY through matter or space. Waves carry energy NOT matter. A wave.
Waves and Wave Properties. A wave is a disturbance that carries energy from place to place. A wave does NOT carry matter with it! It just moves the matter.
Waves. A. What are Waves? - Rhythmic disturbances that carry energy through matter and space. B. Medium - Type of material that waves can pass through.
What is a wave? Waves are rhythmic disturbances that carry energy through matter or space A medium is the material through which a wave travels.
Wave Notes. What types of waves can you think of?
Section 1 & 2: The Nature of Waves. Waves A wave is a repeating disturbance or movement that transfers energy through matter or space. A wave will only.
Behavior of Waves. S8P4. Students will explore the wave nature of sound and electromagnetic radiation. a. Identify the characteristics of electromagnetic.
Waves!!. What are waves?? WAVES are regular or rhythmic disturbances that carry energy through matter or space. Remember, a wave is really just an energy.
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.
Waves. Wave  repeating disturbance or vibration that transfers or moves energy from place to place.
Characteristics of Waves
What’s in a wave? A wave is a repeating disturbance that transfers energy through a medium. A medium is the matter or space through which a wave travels.
What are Waves? A wave is a disturbance that transfers energy from place to place. The material through which a wave travels is called a medium. Ex: Gases.
Waves and Sounds Chapter 18. Waves and Sounds  Characteristics of Waves What are waves? What are waves? Rhythmic disturbances that carry energy through.
Waves A wave is a rhythmic disturbance that transmits ENERGY through matter or space. Waves carry energy NOT matter. A wave exists as long as it has energy.
WAVES.
WAVES: Class Wave A wave is a rhythmic disturbance that carries energy without carrying matter, through matter or empty space.
Ch. 20 Sec. 1 & 2 The Nature of Waves & Properties of Waves
Chapter 11 Waves.
Section 2: Wave Properties
Waves Ch – 25.4.
Notes 2: Wave Properties
17.1 Mechanical Waves.
Waves Wave properties.
Characteristics of Waves
ZAP! Waves.
8.P.3A.1-2 Notes
Waves and Wave Properties
Characteristics of Waves
The Nature and Properties of Waves
Table of Contents Introduction to Waves
Waves.
Chapter 10, Section 2 Notes WAVES Wave Properties.
Wave Properties Learning Goals:
Waves and Wave Properties
What are waves? A wave is a temporary disturbance that transfers energy from place to place.
Waves Wave: a rhythmic disturbance that transfers energy through matter or space. Carries energy without carrying matter from place to place.
Wave Properties Chapter 10.2.
Ch Waves & Sound I. Characteristics of Waves Waves
11-2: Wave Properties.
Properties of Waves 9.2.
Ch 15 Waves.
Ch Waves & Sound I. Characteristics of Waves Waves
Waves I. Characteristics of Waves Waves Transverse waves
WAVES.
Presentation transcript:

Properties of Waves

 Since the waves move back and forth objects move up and down. Imagine riding a water wave. You move up and down because the wave is moving back and forth. Transverse Waves

 A transverse wave has alternating high points, called crests, and low points, called troughs. Parts of a Transverse Wave

 You can model compressional waves with a slinky.  As the wave moves, it looks as if the whole spring is moving toward one end.  The wave carries energy, but not matter, forward along the spring. Longitudinal (Compressional) Waves

 A compressional wave has no crests and troughs.  When you make compressional waves in a coiled spring, a compression is a region where the coils are close together. Parts of a Compressional Wave

 The coils in the region next to a compression are spread apart, or less dense. This less-dense region of a compressional wave is called a rarefaction. Rarefaction

A wavelength is the distance between one point on a wave and the nearest point just like it. For transverse waves the wavelength is the distance from crest to crest or trough to trough. Wavelength

 A wavelength in a compressional wave is the distance between two neighboring compressions or two neighboring rarefactions. Wavelength

The frequency of a wave is the number of wavelengths that pass a fixed point each second. You can find the frequency of a transverse wave by counting the number of crests or troughs that pass by a point each second. The unit for frequency is Hertz (Hz) Example: If 3 waves pass a point in 3 seconds, the frequency is 1Hz. Frequency

 As frequency increases, wavelength decreases  If you move the rope up, down, and back up in 1 s, the frequency of the wave you generate is 1 Hz. Wavelength-Frequency Relationship

 The speed of a wave depends on the medium it is traveling through.  Sound waves usually travel faster in liquids and solids than they do in gases. However, light waves travel more slowly in liquid and solids than they do in gases or in empty space.  Sound waves usually travel faster in a material if the temperature of the material is increased. Speed Depends on the Medium

 You can calculate the speed of a wave represented by v by multiplying its frequency times its wavelength.  Speed (m/s) = frequency (Hz) x wavelength (m)  V = f x λ Calculating the Speed of a Wave

 What is the speed of a wave with a frequency of 5 Hz that has a wavelength of 2m?  V=f x λ  V= 5 x 2 = 10m/s Example Problem 1

Example Problem 2  What is the frequency of a wave that has a wavelength of 2m and a speed of 12m/s?  V = f x λ  12 = f x 2  f = 6 Hz

 Wavelength and frequency vary inversely.  What does this mean?  If the wavelength is long, then the frequency is low.  If the wavelength is short, then the frequency is high. Wavelength, Frequency & Energy

 Wavelength and frequency vary inversely.  What does this mean?  If the wavelength is long, then the frequency is low.  If the wavelength is short, then the frequency is high.  Look at your reference table, find the electromagnetic spectrum.  Which type of electromagnetic wave has the highest frequency? Wavelength, Frequency & Energy

 The higher the frequency the more energy the wave has.  Using your reference table, determine which wave on the electromagnetic spectrum has the least amount of energy?  Hint: Which has the lowest frequency? Wavelength, Frequency & Energy

 Amplitude is related to the energy carried by a wave.  The greater the wave’s amplitude is, the more energy the wave carries.  Amplitude is measured differently for compressional and transverse waves.  The amplitude of a compressional wave is related to how tightly the medium is pushed together at the compressions. Amplitude & Energy

 The amplitude of any transverse wave is the distance from the crest or trough of the wave to the rest position of the medium. Amplitude of Transverse Waves