Ch. 10 – Waves & Sound I. Characteristics of Waves Waves Transverse waves Longitudinal waves...
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Transcript of Ch. 10 – Waves & Sound I. Characteristics of Waves Waves Transverse waves Longitudinal waves...
![Page 1: Ch. 10 – Waves & Sound I. Characteristics of Waves Waves Transverse waves Longitudinal waves Measuring waves.](https://reader036.fdocuments.in/reader036/viewer/2022081721/5514ef3555034693478b5dd7/html5/thumbnails/1.jpg)
Ch. 10 – Waves & Sound
I. Characteristics of Waves Waves Transverse waves Longitudinal waves Measuring waves
![Page 2: Ch. 10 – Waves & Sound I. Characteristics of Waves Waves Transverse waves Longitudinal waves Measuring waves.](https://reader036.fdocuments.in/reader036/viewer/2022081721/5514ef3555034693478b5dd7/html5/thumbnails/2.jpg)
A. Waves
Wavesrhythmic disturbances that carry energy through
matter or space
Medium (mechanical waves need this!!)material through which a wave transfers energysolid, liquid, gas, or combinationelectromagnetic waves don’t need a medium
(e.g. visible light)
![Page 3: Ch. 10 – Waves & Sound I. Characteristics of Waves Waves Transverse waves Longitudinal waves Measuring waves.](https://reader036.fdocuments.in/reader036/viewer/2022081721/5514ef3555034693478b5dd7/html5/thumbnails/3.jpg)
A. Waves
Two Types of Mechanical Waves:
Longitudinal Transverse
![Page 4: Ch. 10 – Waves & Sound I. Characteristics of Waves Waves Transverse waves Longitudinal waves Measuring waves.](https://reader036.fdocuments.in/reader036/viewer/2022081721/5514ef3555034693478b5dd7/html5/thumbnails/4.jpg)
B. Transverse Waves
Transverse Wavesmedium moves
perpendicular to the direction of wave motion
![Page 5: Ch. 10 – Waves & Sound I. Characteristics of Waves Waves Transverse waves Longitudinal waves Measuring waves.](https://reader036.fdocuments.in/reader036/viewer/2022081721/5514ef3555034693478b5dd7/html5/thumbnails/5.jpg)
B. Transverse Waves
Wave Anatomy
crests
troughswavelength
wavelength
amplitude
amplitude
corresponds to the amount of
energy carried by the wave
nodes
![Page 6: Ch. 10 – Waves & Sound I. Characteristics of Waves Waves Transverse waves Longitudinal waves Measuring waves.](https://reader036.fdocuments.in/reader036/viewer/2022081721/5514ef3555034693478b5dd7/html5/thumbnails/6.jpg)
C. Longitudinal Waves
Longitudinal Waves (a.k.a. compressional)medium moves in the same direction as wave
motion
![Page 7: Ch. 10 – Waves & Sound I. Characteristics of Waves Waves Transverse waves Longitudinal waves Measuring waves.](https://reader036.fdocuments.in/reader036/viewer/2022081721/5514ef3555034693478b5dd7/html5/thumbnails/7.jpg)
C. Longitudinal Waves
Wave Anatomy
rarefaction
compression
wavelength
wavelength
Amount of compression corresponds to amount of energy AMPLITUDE
![Page 8: Ch. 10 – Waves & Sound I. Characteristics of Waves Waves Transverse waves Longitudinal waves Measuring waves.](https://reader036.fdocuments.in/reader036/viewer/2022081721/5514ef3555034693478b5dd7/html5/thumbnails/8.jpg)
D. Measuring Waves
Frequency ( f )
# of waves passing a point in 1 second
Hertz (Hz)shorter wavelength
higher frequency higher energy
1 second
f = 2 Hz
f = 3 Hz
![Page 9: Ch. 10 – Waves & Sound I. Characteristics of Waves Waves Transverse waves Longitudinal waves Measuring waves.](https://reader036.fdocuments.in/reader036/viewer/2022081721/5514ef3555034693478b5dd7/html5/thumbnails/9.jpg)
D. Measuring Waves
Velocity ( v )speed of a wave as it moves forwarddepends on wave type and medium
v = × f v: velocity (m/s)
: wavelength (m)
f: frequency (Hz)
![Page 10: Ch. 10 – Waves & Sound I. Characteristics of Waves Waves Transverse waves Longitudinal waves Measuring waves.](https://reader036.fdocuments.in/reader036/viewer/2022081721/5514ef3555034693478b5dd7/html5/thumbnails/10.jpg)
WORK:v = × f
v = (3.20 m)(0.600 Hz)
v = 1.92 m/s
D. Measuring Waves
EX: Find the velocity of a wave in a wave pool if its wavelength is 3.20 m and its frequency is 0.60 Hz.
GIVEN:
v = ?
= 3.20 m
f = 0.600 Hz
v
f
![Page 11: Ch. 10 – Waves & Sound I. Characteristics of Waves Waves Transverse waves Longitudinal waves Measuring waves.](https://reader036.fdocuments.in/reader036/viewer/2022081721/5514ef3555034693478b5dd7/html5/thumbnails/11.jpg)
WORK: f = v ÷
f = (5000 m/s) ÷ (417 m)
f = 12.0 Hz
D. Measuring Waves
EX: An earthquake produces a wave that has a wavelength of 417 m and travels at 5000. m/s. What is its frequency?
GIVEN:
= 417 m
v = 5000. m/s
f = ?
v
f