Wave Motion WOD are underlined. Wave Motion WAVE: A transfer of energy or propagation of a disturbance. A wave is the motion of a disturbance All waves.

Slides:

Advertisements

Similar presentations

Types, characteristics, properties

Advertisements

Physics 1025F Vibrations & Waves

Waves Chapter 11 Section 1.

Chapter 11 Waves. Waves l A wave is a disturbance/oscillation generated from its source and travels over long distances. l A wave transports energy but.

Waves Students will learn about waves. Waves Waves transfer energy without the transfer of mass. A wave is a vibratory disturbance that is transmitted.

WAVES Definition: A traveling disturbance that carries energy through matter and space Waves transfer energy without transferring matter. Waves are produced.

Waves Do the wave!! * In class on board- w/demos * Wave vs particle * Mechancal vs non-mechancal * Longitudinal vs Transverse * Spreading of waves.

Superposition of Waves  Two important concepts that physicists study are Wave Motion Particle Motion  This semester will begin with the study of wave.

Wave Properties Chapter 14.

Chapter 11 Wave Motion A wave is the motion of a disturbance.

PHYS 218 sec Review Chap. 15 Mechanical Waves.

8 th grade science! 1. ◦Sound waves, ◦visible light waves, ◦radio waves, ◦microwaves, ◦water waves, ◦sine waves, ◦Coffee waves, ◦Muddy waves ◦telephone.

J. Tobler. What is a Wave? A disturbance that carries energy through matter or space. They carry energy without transporting matter Waves can do work!

Phy107 Fall 06 1 Exam Results Exam: –Exam scores posted on No homework due next week D C BC B AB A.

Vibrations, Waves, & Sound

When an object moves back and forth, it is called a vibration

Vibrations and Waves Chapter 12.

Objectives Identify the conditions of simple harmonic motion.

Vibrations and Waves Chapter 11.

Chapter 13 Vibrations and Waves. Hooke’s Law F s = - k x F s is the spring force k is the spring constant It is a measure of the stiffness of the spring.

Waves Waves. Types of Waves l Longitudinal: The medium oscillates in the same direction as the wave is moving è Sound l Transverse: The medium oscillates.

1 By: Mike Maloney 2 Waves are everywhere in nature Sound waves, visible light waves, radio waves, microwaves, water waves, sine waves, telephone chord.

1 Waves and Vibrations. 2 Waves are everywhere in nature Sound waves, visible light waves, radio waves, microwaves, water waves, sine waves, telephone.

1 Waves and Vibrations. 2 Waves are everywhere in nature Sound waves, visible light waves, radio waves, microwaves, water waves, sine waves, telephone.

Ch14 Waves. Wave Types Mechanical Waves: require a material medium to propagate. WaterRope SpringsSound 3 types of Mechanical Waves –Transverse –Longitudinal.

Chapter 17 Waves. Wave Motion Fundamental to physics (as important as particles) Fundamental to physics (as important as particles) A wave is the motion.

1 Waves and Vibrations Spectra of Science Amole. 2 Waves are everywhere in nature Sound waves, visible light waves, radio waves, microwaves, water waves,

Unit 12, Presentation 2. Simple Pendulum  The simple pendulum is another example of simple harmonic motion  The force is the component of the weight.

Physics 11 Vibrations and Waves Mr. Jean December 15 th, 2014.

Chapter 13 VibrationsandWaves. Hooke’s Law F s = - k x F s = - k x F s is the spring force F s is the spring force k is the spring constant k is the spring.

Vibrations and Waves Chapter 11.

Chapter 19 Vibrations and Waves Vibration: A disturbance “wiggle” in time.

Daily Challenge, 10/2 Give 3 examples of motions that are periodic, or repeating.

WAVE Basics Chapters 15.

Chapter 11:Vibrartions and Waves

* Waves and Vibrations. * Waves are everywhere in nature Sound waves, visible light waves, radio waves, microwaves, water waves, sine waves, telephone.

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Chapter 11 Objectives Distinguish local particle vibrations from.

Chapter 11 Preview Objectives Hooke’s Law Sample Problem

WAVES. COS 9.0, 9.1,9.2 WHAT YOU’LL LEARN Recognize that waves transfer energy. Distinguish between mechanical waves and electromagnetic waves. Explain.

Waves Rhythmic disturbance that carries energy through matter or space.

12-3 Properties of Waves.  A wave is the motion of a disturbance.  Waves of almost every kind require a material medium to travel through.  Waves that.

1 Waves and Vibrations. 2 Waves are everywhere in nature Sound waves, visible light waves, radio waves, microwaves, water waves, sine waves, telephone.

Hooke’s Law F s = - k x F s is the spring force k is the spring constant It is a measure of the stiffness of the spring A large k indicates a stiff spring.

Waves and Sound Wave Characteristics.

Example: pulse on a string speed of pulse = wave speed = v

Vibrations and Waves Chapter 12. Simple Harmonic Motion A motion that occurs repeatedly, vibrating back and forth over its equilibrium point. The force.

Wave Characteristics and Speed. a traveling disturbance that carries energy through matter or space matter moves horizontally or vertically just a little,

Wave are oscillations (repeating disturbance or movement) that transfers energy through matter or space. Wave- energy transfer due to the movement due.

Fig. 13-CO, p Fig , p. 456 Fig , p. 457.

VibrationsandWaves. Ch. 14 examines wave motion and the oscillating, vibrating motion that creates them. This oscillating motion is known as periodic.

1 Waves and Vibrations. 2 Waves are everywhere in nature Sound waves, visible light waves, radio waves, microwaves, water waves, sine waves, telephone.

Holt Physics Chapter 12 Waves.

Chapter 14 Vibrations and Waves. Hooke’s Law F s = - k x F s is the spring force k is the spring constant It is a measure of the stiffness of the spring.

Chapter 12 Vibrations and Waves. Section 12-1: Simple Harmonic Motion A repeated motion, such as that of an acrobat swinging on a trapeze, is called a.

Chapter 17 – Mechanical Waves and Sound Mechanical Waves Water waves have two features common to all waves: 1. A wave is a traveling disturbance.

Chapter 13 Vibrations and Waves. Hooke’s Law F s = - k x F s is the spring force k is the spring constant It is a measure of the stiffness of the spring.

Waves Waves are “a disturbance that transfers energy”.

Waves and Vibrations Physics: Mr. Maloney.

Waves & Their Properties

Vibrations and Waves.

Waves and Vibrations.

Chapter 13 Vibrations and Waves.

Vibrations and Waves 12-3 Properties of Waves.

11-3: PROPERTIES OF WAVES.

11-3: PROPERTIES OF WAVES.

Intro to Waves.

Waves and Vibrations * *.

Transfers Energy Without Transferring Matter

Presentation transcript:

Wave Motion WOD are underlined

Wave Motion WAVE: A transfer of energy or propagation of a disturbance. A wave is the motion of a disturbance All waves carry energy and momentum.

Wave Motion A wave is the motion of a disturbance Mechanical waves: require –A medium that can be disturbed –Some source of disturbance, i.e., a wave generator. All waves carry energy and momentum

Transverse Wave Wave movement is perpendicular to wave propagation. Wave is up and down motion.

Transverse

Longitudinal Wave or Compression Wave Wave movement is parallel to wave propagation. Demo with Colored Slinky.

To Prof: On Next slide: Show 1. Wave Generator 2. Fixed End 3. Reflection 4. Wave and Reflection Add 5. Molecules do not propagate, but only oscilllate.

Longitudinal

Waves do not move material. The medium – the material that is “waving”. It only oscillates. It does not move forward along with the wave. MEDIUM DOES NOT MOVE FORWARD. It stays in place and oscillates. Note the blue bobber in the next slide.

Surface waves

By watching the blue bobber oscillate, it can be seen that a surface wave is a combination of a transverse wave (up and down) and a longitudinal wave (left and right) which produces a SHM in the shape of a circle.

Parts of a wave. They repeat.

1 wave Ending Node is Starting Node for the next wave.

Waveform – A Picture of a Wave The brown curve is a “snapshot” of the wave at some instant in time The blue curve is later in time The high points are crests of the wave The low points are troughs of the wave

Wave Parts: Crests: high points Troughs: low points Nodes: Zeros or Intercepts

New Symbol Wavelength: “λ” – Lambda The length of the wave Distance between identical points on adjacent periods, i.e., crest to crest, trough to trough, or starting node to starting node. Measured in meters –Or micrometers or nanometers

In the drawing, one cycle is shaded in color. The amplitude A is the maximum excursion of a particle of the medium from the particles undisturbed position. The wavelength is the horizontal length of one cycle of the wave. The period is the time required for one complete cycle. The frequency is related to the period and has units of Hz, or s -1.

Velocity of a wave Remember –λ = distance per cycle –f = cycles per time Multiply them together: – λ*f= distance/cycle * cycles/time

Velocity of a wave Remember –λ = distance per cycle –f = cycles per time Multiply them together: – λ*f= distance/cycle * cycles/time –λ*f= distance/time = velocity –Velocity of wave: v = f λ

Velocity of a wave The velocity of a wave is determined entirely by the medium. The frequency of a wave is determined entirely by the source (wave generator). The wavelength, λ= v/f

Velocity of a wave The velocity of a wave is determined entirely by the medium. i.e.,: Sound travels at different speeds through water, air, and wood.

Problem A Helium-Neon laser has a wavelength of 6.33 *10 -7 m, and a frequency of 4.74 * Hz. Find the velocity of this laser beam.

Problem A Helium-Neon laser has a wavelength of 6.33 *10 -7 m, and a frequency of 4.74 * Hz. Find the velocity of this laser beam. v = f λ = 4.74 * Hz * 6.33 *10 -7 m =

As a sine wave A transverse wave can easily be viewed as a sine wave

Longitudinal waves can too.

Areas of high density are called Compressions. Areas of low density are called Rarefactions. Density is a sine wave Note: The speaker causes compressions in the air, which you ear interprets as sound.

Interference of Waves

Two traveling waves can meet and pass through each other without being destroyed or even altered Waves obey the Superposition Principle –Superposition Principle states the resulting wave is found by adding together the displacements of the individual waves point by point

What’s going to happen? Two wave move towards each other

They add up on top of each other

Afterwards The two waves disturbances have no lasting effect on each other

What’s going to happen? Two wave move towards each other

They add up on top of each other

Afterwards The two waves disturbances have no lasting effect on each other

Constructive Interference Two waves, a and b, have the same frequency. –Are in phase The combined wave, c, has the same frequency and a greater amplitude.

Destructive Interference Two waves, a and b, have the same amplitude and frequency They are half a cycle out of phase When they combine, the waveforms cancel Wave of same f, out of phase, cancel each other.

Reflection of Waves – Fixed End Whenever a traveling wave reaches a boundary, some or all of the wave is reflected

Reflection of Waves – Fixed End Whenever a traveling wave reaches a boundary, some or all of the wave is reflected When it is reflected from a fixed end, the wave is inverted. The shape remains the same, just upside down.

What happens when a wave interferes with its own reflection? Sometimes we get standing waves.

The a string will only allow certain wavelengths to be standing waves because the endpoints need to be nodes, i.e., the length of the string determines the wavelength for harmonics. For a string with two fixed ends, –λ= 2L / n n = 1, 2, 3, 4 …….