Waves and Sound PHYS 1090 Unit 7.

Slides:

Advertisements

Similar presentations

Whiteboard Work 1.A child on a playground swing makes a complete to-and-fro swing every 2 seconds. a.What is the frequency of the swinging? b.What is the.

Advertisements

Waves and Energy Transfer Chapter 15 pages

Waves Energy can be transported by transfer of matter. For example by a thrown object. Energy can also be transported by wave motion without the transfer.

Wave Properties Chapter 14.

WAVE CHARACTERISTICS. TRANSVERSE WAVE Crest: highest point of a transverse wave. Trough: lowest point of a transverse wave. Amplitude maximum distance.

Waves and Sound AP Physics 1. What is a wave A WAVE is a vibration or disturbance in space. A MEDIUM is the substance that all SOUND WAVES travel through.

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.

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

Characteristics of Waves

Chapter 12: Vibrations and Waves Section 1: Simple harmonic motion Section 2: Measuring simple harmonic motion Section 3: Properties of waves Section 4:

WAVE Basics Chapters 15.

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.

Chapter 11:Vibrartions and Waves

What is a wave?  A wave is a transfer of energy from one point to another via a traveling disturbance  A wave is characterized by its wavelength, frequency,

Waves Chapter 10. The Nature of Waves wave: repeating disturbance or movement that transfers energy through matter or space -examples: light, ocean, sound,

Vibrations and Waves. Periodic Motion u Motion that follows the same path over equal time intervals u Include orbiting planets, moons, vibrating objects,

Copyright © 2009 Pearson Education, Inc. Lecture 1 – Waves & Sound b) Wave Motion & Properties.

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.

17.1: There are 2 types of waves. Electromagnetic: don’t need a medium to travel. Mechanical: need a medium to travel.

Waves and Energy Transfer

Chapter 11 Waves. Chapter 11.1 Notes Wave is a disturbance that transmits energy through matter and space. Medium is the matter through which a wave travels.

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

Part 1 – Wave Characteristics. What is a Wave? A disturbance that carries energy through matter or space.

Waves. Waves 3 Types of Waves Mechanical Waves: Wave motion that requires a medium (ie. water, sound, slinkies, …) Electromagnetic Waves: No medium is.

WAVES Vibrations that carry energy from one place to another.

Waves Wave - rhythmic disturbance that carries energy through matter or space. ex: water, sound, rope, springs, electromagnetic wave pulse - single disturbance,

Waves. What are waves? A wave is a transfer of energy from one place to another. Waves take many forms. Wave Characteristics include: –Amplitude –Wavelength.

Group Work 1.Add these two waves together.. Waves Part 2: resonance and more dimensions.

Light and Sound energy. Wave Definition A wave – is something that carries energy though matter or space. Waves transfer energy Energy spreads out as.

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

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

Characteristics of Waves

The Behavior of Waves Chapter 17:3. Science Journal Entry 34 Compare and contrast transverse waves, longitudinal waves, and surface waves.

Wave Interference A material object will not share its space with another object, but more than one wave can exist at the.

Wave Properties.

Chapter 17: Mechanical Waves & Sound

Waves and Vibrations Physics: Mr. Maloney.

Chapter 7 Characteristics of Waves

Waves & Their Properties

Whiteboard Work A child on a playground swing makes a complete to-and-fro swing every 2 seconds. What is the frequency of the swinging? What is the period.

General Physics waves_2

Damping Sometimes engineers don’t want springs to keep oscillating.

Waves Vocabulary.

Warm Up 1. How are longitudinal wavelengths measured?

Combining Waves interference §

What are waves? A wave is a transfer of energy from one place to another. Waves take many forms. Wave Characteristics include: Amplitude Wavelength Frequency.

Ch. 12 Waves pgs

Waves and Vibrations.

11-3: PROPERTIES OF WAVES.

11-3: PROPERTIES OF WAVES.

Waves Introduction.

Physical Science Force

Intro to Waves.

Vibrations and Waves.

What are waves? A wave is a transfer of energy from one place to another. Waves take many forms. Wave Characteristics include: Amplitude Wavelength Frequency.

SCI 340 L39 Wave interference

SCI 340 L37 Waves 1 Whiteboard Work

Waves Physics Notes.

Waves AP Physics.

Mechanical Waves and Sound

14.2 Wave Properties.

Waves and Vibrations * *.

“Waves” Vocabulary Quiz

Waves Chapter 11 part 2.

Presentation transcript:

Waves and Sound PHYS 1090 Unit 7

Features of a Wave crest trough Crest: high point Trough: low point Wavelength: crest-crest distance (m) crest Period: crest-crest-timing (s) Here we define names for wave features so that we can communicate easily. l trough

Features of a Wave Amplitude A: (crest height – trough height) / 2 Frequency f: repeats in a given time (cyc/s = Hz) Velocity u: speed of crest motion (m/s) Here we define names for wave features so that we can communicate easily. u A

Relations between Features Period T = 1 / f ; Frequency f = 1 / T Velocity u = l / T = lf Wavelength l = uT = u / f Frequency f = u / l; Period T = l / u

Types of Waves Motion of the medium is perpendicular to the direction the wave travels: transverse wave (example: string wave) Motion of the medium is parallel to the direction the wave travels: longitudinal wave (examples: sound wave, slinky wave) Animation Crest and trough of a longitudinal wave: moving regions of highest and lowest pressure or density. Amplitude of a longitudinal wave: Half the total change in pressure or density

Combining Waves

Adding Waves Together result 3 –3 Run at: W1 = 0.2; k1 = 0.2; ampl = 15 integral multiples (half, third, quarter) of lambda: multiply W1, k1 by 2, 3, 4 add same-lambda wave with negative amplitude Beats: slightly vary w2 and k2 together from wave 1 values Standing waves (use phase velocity of 0.5: k = 2*w) result –3

Wave Interference Constructive: Sum of waves has increased amplitude Destructive: Sum of waves has decreased amplitude Two-wave simulation

Beats Waves of similar frequency combine to give alternating times of constructive and destructive interference

Standing Waves Add a wave to an identical wave traveling in the opposite direction (Its reflection) Medium vibrates, but waves don’t travel Nodes: positions of zero variation Antinodes: positions of maximum variation

Two-Dimensional Waves Ocean waves, earthquake surface waves Wave types animations Membrane standing waves animations

Water Waves Restoring force is gravity Fastest in deep water, slow in shallow water Breaking and refractive behavior in shallow water Speed depends on wavelength Very complicated behavior!

Shoaling and Breaking Waves slow in shallows by shore Wavelength shortens and amplitude rises Troughs move slower than crests Crests fall forward

Wave refraction u = 1/2 u = 3/4 u = 1

Ocean Wave Refraction

2-D Wave Interference interference patterns http://www.falstad.com/ripple/