Chapter 11: WAVES

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More
 Earthquakes-(Seismic waves)
 Light--

ENERGY
 ENERGY

ENERGY

ENERGY

waves require air.)
(Ex. Sound





AIR
WATER



ENERGY
TRANSVERSE
COMPRESSIONAL
Compressional—P-wave
Transverse—S-wave
medium
energy
fast
TRANSVERSE WAVES—
 What they look like
(troughs)
(crests)

COMPRESSION-
RAREFACTION-
frequency
hertz (Hz)
wavelength
1 Hz
1 Hz
1
1 second
1λ/s

frequency increases wavelength
decreases
 SPEED
WAVELENGTH
v
λ
λ
f
v
v
FREQUENCY
f
 SPEED = WAVELENGTH X FREQUENCY
v = λ x f
Example: (do on your own)
λ = 3 m, f = 10 Hz

 AMPLITUDE

AMPLITUDE
ENERGY
ENERGY
If you’ve ever been knocked over by an
ocean wave, you know that the higher the
wave, the more energy it carries.
LIGHT
SOUND
ECHOES are caused by wave reflection.
 REFLECTION
sound, light, water
 ECHO (REFLECTION OF SOUND WAVES)--
air
water
light wave
 REFRACTION
(Example—RAINBOWS—LIGHT WAVES
AIR
WATER)
 DIFFRACTION
 DIFFRACTION
bend.
REFRACTION
refraction
diffraction
refraction
diffraction
OVERLAP
INTERFERENCE.
ADD
SUBTRACT
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