Announcements 2/22/11 Prayer Dispersion lab due tonight Labs 4 & 5 due Saturday I will have office hours today.

Slides:

Advertisements

Similar presentations

Applications of Resonance Harmonics and Beats. Beats Not that kind Not that kind This is due to the interference of two waves of similar frequencies.

Advertisements

1. If this standing wave is 3.2 m long, what is the wavelength? (2.56 m)

DO NOW 1.In an open tube resonator, there is a pressure ________ at both ends. 2.In a close tube resonator, there is a pressure _________ at the closed.

The Organ Pipe.  During the last two labs you explored the superposition of waves and standing waves on a string.  Just as a reminder, when two waves.

11: Wave Phenomena 11.1 Standing (Stationary) Waves.

A.2 Standing (Stationary) Waves

Announcements 2/18/11 Prayer Exam 1: a. a.Graded, available for pick up in HW boxes b. b.Median: 82.5; mean: Five scores of c. c.My apologies.

Announcements 10/12/11 Prayer Term projects: Proposals due a week from Saturday, ed to me with your proposal in body of . Groups of 2 are encouraged.

Announcements 10/13/10 Prayer Change to reading assignment: a. a.For Friday: 18.2 – 18.6 b. b.For Monday: 18.7 and PpP 4.1 Exams graded, returned to boxes.

Announcements 10/14/11 Prayer Lab 3 ends Saturday a. a.See for some more info about the “uncertainty principle” used in the lab.

Announcements 10/15/10 Prayer Long list of HW changes/corrections/clarifications, see Dispersion lab due tomorrow. Labs 4 & 5 starting tomorrow Term.

Resonance in Air Columns. Closed Air Columns Column that is closed at one end and open at the other.

WAVES Vibrations (disturbances) that carry energy from one place to another Presentation 2003 Philip M. Dauber as Modified by R. McDermott.

Sound barrier is the buildup of sound waves in front of an object moving near the speed of sound. Sonic boom is created when an object breaks the sound.

Standing Waves When an incident wave interferes with a reflected wave to form areas of constructive and destructive interference. When an incident wave.

THE PHYSICS OF MUSIC ♫. MUSIC Musical Tone- Pleasing sounds that have periodic wave patterns. Quality of sound- distinguishes identical notes from different.

Announcements 10/12/12 Prayer Lab 3 due tomorrow, Labs 4 and 5 start tomorrow rob-sheridan.com.

Physics 1C Lecture 14A Monday Quiz Topics: Mass on a spring Mass on a string = simple pendulum Equation for simple harmonic motion Energy in oscillations.

A “physical phenomenon that stimulates the sense of hearing.”

13.3. Harmonics A vibrating string will produce standing waves whose frequencies depend upon the length of the string. Harmonics Video 2:34.

Stringed Instruments (Ex. Guitars, pianos, violins)  Vibrating the string sets up a standing wave, the vibration from the string resonate the sounding.

11/25 Standing Waves (for Lab)

An organ pipe open at both ends is 1. 5 m long

AP Physics B IV.A Wave Motion. Two features common to all waves mechanical waves A wave is a traveling disturbance A wave carries energy from place to.

Standing Waves Music to my ears ? II.

Standing Waves! SINGING TREE. Standing Waves! Standing Wave – a stable, repetitive wave that appears to oscillate in place Standing waves only arise.

Sound Waves The production of sound involves setting up a wave in air. To set up a CONTINUOUS sound you will need to set a standing wave pattern. Three.

STANDING WAVES. Standing Waves - appear to be ‘standing’ still in their left to right motion - in constant position.

Ch17. The Principle of Linear Superposition and Interference Phenomena

WAVES Vibrations that carry energy from one place to another.

The Physics of Musical Instruments

Resonance matching of forced vibration and natural frequency of an object, resulting in large amplitude of waves (standing wave + constructive interference.

Longitudinal Standing Waves antinodes (max. vibration) nodes (no vibration)

SoundSection 3 What do you think? A violin, a trumpet, and a clarinet all play the same note, a concert A. However, they all sound different. What is the.

Announcements 10/10/12 Prayer Term projects: Proposals due a week from Saturday, ed to me with your proposal in body of . Groups of 2 are encouraged.

Wave Interference Superposition Principle – when two or more waves encounter each other while traveling through a medium, the resultant wave is found by.

Waves and Sound Honors Physics.

WAVES Vibrations that carry energy from one place to another.

Harmonics Review Music to my ears?. Standing Waves Vibrating Strings Each standing wave has a different frequency Single pitches = Multiple frequencies.

For a standing wave to be set up in a string there has to be two waves travelling in it. Explain what has to be the same and what has to be different about.

April 14 – April 15. What is the definition of a wave? Example: Sound from a speaker traveling through air to my ear. All waves ‘travel’ or carry energy.

Stationary Waves Stationary waves are produced by superposition of two progressive waves.

Harmonics. Strings as Harmonic Oscillators Its mass gives it inertia Its mass gives it inertia Its tension and curvature give it a restoring force Its.

Which wave phenomenon is represented in the diagram?

Adding waves can be positive or negative.. Superposition  When two (or more) waves interfere (meet… they’re at the same place at the same time) the resultant.

CONTENTS Formation, structure and terminology In pipes Wavelength and L (length), velocity o Experiments are not described in this power point. o Observing.

Chapter 3 Transverse standing waves Resonance and the Overtone Series Mersenne’s laws Longitudinal standing waves Other standing waves and applications.

Music Music is a “ pleasant ” sound (longitudinal) wave. The pitch is the frequency of the wave. The loudness is the amplitude of the wave. Music is made.

 Please take out: Sound Station Lab Natural frequency and resonance notes.

Wave Interference and Standing Waves. Interference Constructive interference – Peak and peak – Trough and trough += Destructive interference – Peak and.

Vibrations that carry energy from one place to another

Standing Waves.

Interference When waves meet, a new wave is generated in a process called interference. Interference may create a pattern that looks jumbled Interference.

Notes 21.2: RESONANCE.

Resonant Air Columns.

Standing Waves.

Chapter 13 Objectives Explain why resonance occurs.

Standing waves.

Standing Waves 14.8 When a traveling wave reflects back on itself, it creates traveling waves in both directions The wave and its reflection interfere.

Resonance & Standing Waves

Standing waves review A standing wave occurs when there is constructive interference between a wave and it reflections from a boundary.

Standing waves and wave behavior

By: Jennifer W, JohnathanW, Barry L

Lesson 5: Standing waves

Topic 10: Waves Our subtopic: Music and tubes!

THE PHYSICS OF MUSIC ♫.

1 If a guitar string has a fundamental frequency of 500 Hz, which one of the following frequencies can set the string into resonant vibration? (A) 250.

Day Topic: Standing Waves

Music Examples Answers

Presentation transcript:

Announcements 2/22/11 Prayer Dispersion lab due tonight Labs 4 & 5 due Saturday I will have office hours today

Interference Path length a. a.Constructive b. b.Destructive Demo: Moire pattern transparencies Video: Two outdoor speakers Ripple Tank image: wikipedia

Reading Quiz In a standing wave, the points that have the maximum vibration are called: a. a.nodes b. b.antinodes

Standing Waves Demo: Rubber tubing Image from Wikipedia

Standing Waves Will occur whenever you have two waves (same frequency, wavelength) moving in opposite directions Math: A cos(kx -  t) + A cos(kx +  t)  From trig.: cos(a–b) + cos(a+b) = 2cos(a)cos(b) Can occur via refletions of a single wave! But timing (frequency) has to be just right for it to occur over & over again Web demo, revisited Image by Colton

Demos Video: Demo: “Ladies belt” Videos: Bowling ball, goblet, [Tacoma Narrows bridge] Demo: Trumpet “Resonance”

Standing Wave Patterns Back to Ladies belt demo a. a.What kinds of patterns do you get? b. b.“node” vs “antinode” Harmonics

Standing waves on a string: “Closed-Closed” For stable patterns: L = _______ What are the frequencies? Relative to the fundamental frequency? L L  L 

Standing waves in air: “Open-Open” Quick writing: draw what you think the second harmonic should look like For stable patterns: L = _______ What are the frequencies? Relative to the fundamental frequency? Demo: Trumpet, again Open end L  Example: organ pipe

Standing waves in air: “Open-Closed” Quick writing: draw what you think the second, third, and fourth harmonics should look like For stable patterns: L = _______ What are the frequencies? Relative to the fundamental frequency? Why wasn’t trumpet in this category? Open end Closed end L 

Standing Waves in 2D Again, from Wikipedia Advertisement for Physics 318!

Standing Waves in 3D From Colton and Wienkes, Rev. Sci. Instr., 2009 a. a.Light waves, frequency = 10 GHz (microwaves) Advertisement for Physics 641! Do they exist? Class poll

Final Demo Flame standing waves