Transverse and Longitudinal Wave p. 71 IN

1
Transverse and Longitudinal Wave p. 71 IN

• Chapter 15
• Section 1 Types of Waves
• Section 2 Characteristics of Waves
• Section 3 Wave Interactions

SPS9. Students will investigate the properties of
waves. a. Recognize that all waves transfer
energy.
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Basic Wave Information

• Waves are a disturbance that carries energy
  through matter.
• Need energy.
• Transfers energy.
• Increase in size as ENERGY increases.
• Louder
• Brighter
• Sharper
• Are usually produced by VIBRATIONS.

3
Basic Wave Information

• There are two types of waves
• Mechanical waves
• Electromagnetic waves

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Waves - Specifically

• Waves have two different appearances
• Some waves are transverse and some waves are
  longitudinal.

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Transverse Wave
Transverse waves have crest and troughs
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Transverse Waves

• Motion of wave is PERPENDICULAR to the movement.

Movement Direction
7
Longitudinal Wave
Pushed together
Spread Out
Longitudinal waves have compressions and
rarefactions.
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Longitudinal Wave

• Wave motion is parallel to the motion.

Movement Direction
9
Video How Longitudinal Waves Travel

• Smoke Rings (323)
• http//www.stevespanglerscience.com/experiment/air
  -cannon-smoke-ring-vortex-launcher
• BETTER!
• http//www.youtube.com/watch?v-VL0M0jmu7k

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Wave Properties - Crest
Crest!

• Image A typical SINE wave.
• The top of a wave is called the crest.

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Wave Properties - Amplitude

• The top of the wave to the point of origin.
• Half the total height of the wave.

Amplitude!
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Wave Properties - Wavelength

• The distance from crest to crest.
• The distance from trough to trough.
• The distance from one point of the wave to the
  next point.

Wavelength!
Wavelength!
Wavelength!
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Longitudinal Wave

• Wavelength from compression to compression or
  rarefaction to rarefaction

Wavelength!
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Wave Energy

• The higher the amplitude the more energy the wave
  has.
• The shorter (closer together) the wavelength the
  more energy the wave has.
• Louder
• Brighter
• Intense

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Left Side Activity

• Look over all the notes and complete a left side
  activity for these notes on p. 70 of IN.

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Essential Questions

• Read the EQ on p. 61
• Answer questions 1-5 on page 60