Waves

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Waves. What is a wave?*. Energy is transferred through a wave . Mechanical waves- travel through a medium Electromagnetic waves- do not need a medium to travel Can you think of examples of each? Which one does this picture represent? - PowerPoint PPT Presentation

Transcript of Waves

Page 1: Waves
Page 2: Waves

What is a wave?*Energy is transferred through a wave.Mechanical waves- travel through a mediumElectromagnetic waves- do not need a

medium to travelCan you think of examples of each? Which one does this picture represent?

Sound waves are mechanical because they need a medium to travel.

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Brain Pophttp://www.brainpop.com/science/energy/wav

es/

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What is sound?*Sound begins with a vibration.Sounds travel in waves through a medium.

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Mechanical Waves*Transverse Waves

The motion of the medium is perpendicular to the motion of the wave

Up and Down Waves

Longitudinal WavesThe motion of the

medium is parallel to the motion of the wave

Back and Forth Waves

**Sound Waves**

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Another View

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Longitudinal Waves*Compression

When waves are close together

RarefactionWhen waves are far

apart

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Transverse Waves*Crest- highest point

on a waveAmplitude- Volume

of a wave (height of a wave)As wave height

increases, volume increases

Measured in Decibels

Trough- lowest point on a wave

Frequency- Pitch, high or low (length of a wave)As wavelength

increases, pitch decreases

Measured in Hertz

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Amplitude versus FrequencyAmplitude

Which one will have the higher volume?

FrequencyWhich one will have

the higher pitch?

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What can you hear?Decibels (dB): Volume

Normal Speech: 60dBLibrary: 40dBClose Whisper: 20dBJet Engine: 140dBLoud Rock Music:

110dBSubway Train: 100dBBusy Street Traffic:

70dB120dB or above usually

causes pain to the ear

Hertz (Hz): Pitch Young people can

hear frequencies between 20-20,000 Hz

Dogs can hear frequencies that range from 67-45,000 Hz

As you age, your ability to hear high frequency sound decreases.

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Now you will create a diagram for the parts of a wave.

Use string and tape. An example is on the next slide.

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Diagram of a Transverse Wave*CREST

TROUGH WAVELENGTH

AMPLITUDE

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Cool Waves!http://paws.kettering.edu/~drussell/Demos/

waves-intro/waves-intro.html   http://sunshine.chpc.utah.edu/labs/waves/

wave_basics/waves.htm   http://paws.kettering.edu/~drussell/Demos/

waves/wavemotion.html

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United Streaminghttp://player.discoveryeducation.com/

index.cfm?guidAssetId=75244603-66D0-4066-9608-85B309BD65FC&blnFromSearch=1&productcode=US


Waves Waves are everywhere. Sound waves, visible light waves, radio waves, microwaves, water waves, sine waves, cosine waves, earthquake waves, waves on.

Waves Waves are everywhere. Sound waves, visible light waves, radio waves, microwaves, water waves, sine waves, cosine waves, earthquake waves, waves on.

1 Sound. 2 Sound Waves Sound waves travel as compression waves. Another name for compression waves is longitudinal waves.

1 Sound. 2 Sound Waves Sound waves travel as compression waves. Another name for compression waves is longitudinal waves.

Types of Waves (1) Mechanical waves and electromagnetic waves

Types of Waves (1) Mechanical waves and electromagnetic waves

Waves. Waves are everywhere. Sound waves, light waves, water waves, stadium waves, earthquake waves, waves on a string, and slinky waves and are just.

Waves. Waves are everywhere. Sound waves, light waves, water waves, stadium waves, earthquake waves, waves on a string, and slinky waves and are just.

Waves. There are 2 types of waves –Transverse waves –Longitudinal waves.

Waves. There are 2 types of waves –Transverse waves –Longitudinal waves.

Wave - II. 1. Sound Waves Sound Waves: ANY Longitudinal Waves Waves on Strings, etc.: Transverse Waves These are material waves.

Wave - II. 1. Sound Waves Sound Waves: ANY Longitudinal Waves Waves on Strings, etc.: Transverse Waves These are material waves.

Characteristics of Waves What Are Waves? Properties of Waves Interactions of Waves Seismic Waves Table of Contents.

Characteristics of Waves What Are Waves? Properties of Waves Interactions of Waves Seismic Waves Table of Contents.

Waves. Examples –Water waves –Sound waves –Light waves –Radio waves –microwaves.

Waves. Examples –Water waves –Sound waves –Light waves –Radio waves –microwaves.

1 Waves and Vibrations Physics: Mr. Maloney. 2 Waves are everywhere in nature Sound waves, visible light waves, radio waves, microwaves, water waves,

1 Waves and Vibrations Physics: Mr. Maloney. 2 Waves are everywhere in nature Sound waves, visible light waves, radio waves, microwaves, water waves,

Chapter 16 - Waves - Pennsylvania State UniversityChapter 16 - Waves Objectives (Ch 16) The Basics of Waves Energy of Waves Interference of Waves Standing Waves The Basics of Waves

Chapter 16 - Waves - Pennsylvania State UniversityChapter 16 - Waves Objectives (Ch 16) The Basics of Waves Energy of Waves Interference of Waves Standing Waves The Basics of Waves

Waves & Sound I. Characteristics of Waves Waves Transverse waves Longitudinal waves Measuring waves.

Waves & Sound I. Characteristics of Waves Waves Transverse waves Longitudinal waves Measuring waves.

Experimental Study of Sound Waves in Sandy Sediment · parameters of acoustic waves (also called sound waves, compressional waves, bulk com-pressional waves, and dilatational waves)

Experimental Study of Sound Waves in Sandy Sediment · parameters of acoustic waves (also called sound waves, compressional waves, bulk com-pressional waves, and dilatational waves)

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.

WAVES. Where do you find waves in nature? water waves, ocean waves, sound waves, radio waves, light waves, earthquake waves, microwaves, gamma waves,

WAVES. Where do you find waves in nature? water waves, ocean waves, sound waves, radio waves, light waves, earthquake waves, microwaves, gamma waves,

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

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

07 Waves I - Waves

07 Waves I - Waves

Engineering & Waves: Seismic Waves

Engineering & Waves: Seismic Waves

Topic List Types of Waves Longitudinal Waves Transverse Waves Surface Waves Frequency Wavelength Period Amplitude Wave speed Transmission of Waves Reflection.

Topic List Types of Waves Longitudinal Waves Transverse Waves Surface Waves Frequency Wavelength Period Amplitude Wave speed Transmission of Waves Reflection.

WAVES. Waves can be… Water waves Sound waves Light waves Earthquake waves Waves in a slinky Stadium waves.

WAVES. Waves can be… Water waves Sound waves Light waves Earthquake waves Waves in a slinky Stadium waves.

Waves (in general) sine waves are nice other types of waves (such as square waves, sawtooth waves, etc.) can be formed by a superposition of sine waves.

Waves (in general) sine waves are nice other types of waves (such as square waves, sawtooth waves, etc.) can be formed by a superposition of sine waves.