Download Electromagnetic Waves Light and Optics Visual Highlights

How does this
phone stay
connected?
page 502
1
Electromagnetic waves
transfer energy through
radiation.
Electromagnetic Waves
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Electromagnetic waves have unique traits.
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MATH IN SCIENCE Using Exponents
Electromagnetic waves have many uses.
THINK SCIENCE Are Cell Phones Harmful?
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The Sun is the source of most visible light.
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Light waves interact with materials.
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CHAPTER INVESTIGATION Wavelength and Color
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Optical tools depend on the
wave behavior of light.
Light and Optics
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Mirrors form images by reflecting light.
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MATH IN SCIENCE Measuring Angles
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Lenses form images by refracting light.
CHAPTER INVESTIGATION Looking at Lenses
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The eye is a natural optical tool.
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Optical technology makes use of light waves.
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SCIENCE ON THE JOB Optics in Photography
Visual Highlights
How Musical Instruments Work
The way a musical instrument vibrates when it is
played determines the sound it produces.
Stringed Instruments
Stringed instruments, such as the guitar, are played by
plucking the strings. The plucking starts the vibrations
that produce sound waves.
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1
To play a different
pitch, the player
presses on a string
to shorten it. A
shorter string produces a higher pitch.
The vibrations begin
when a player plucks
one of the strings.
soundboard
bridge
sound hole
4
The sound waves exit
the guitar through
the sound hole.
2
The vibrations travel through the
bridge to the soundboard, which
makes the entire soundboard vibrate.
body
3
As the soundboard vibrates, the
air inside the body also vibrates,
which amplifies the sound waves.
Wind Instruments
Percussion Instruments
Musicians play the trombone by blowing into a
mouthpiece. Sound waves are produced by a
column of vibrating air. Like the length of a
musical string, the length of the air column
determines the pitch.
Musicians play a drum by
striking a tightly stretched
skin. The vibrations of the
tight skin send out sound
waves. The size and
tightness of the
drum skin determine
the pitch.
Graphing a Wave
Sound Frequencies Heard by Animals
How Musical Instruments Work
The Electromagnetic Spectrum
How a Convex Lens Forms an Image
Microscopes and Telescopes
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Chapter 2: Sound 61
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