Bell%20Ringer4-28-10

1
Bell Ringer 4-28-10

1. A wave is a disturbance that transfers ______.
2. A ______ wave requires a medium to travel
   through.
3. Name the two types of mechanical waves and give
   an example of each.

2
Review
3
Sound Waves

• Longitudinal Waves

4
Sound Waves
5
Chapter 15 Section 2

• Properties of Waves

6
Waves are Different

• Fast or slow
• Short or long
• Carry a little energy or a lot of energy

7
4 Basic Properties Of Waves

1. Amplitude
2. Wavelength
3. Frequency
4. Speed

8
Amplitude

• The amplitude is the height of the wave.
• The more energy a wave has, the greater its
  amplitude.

9
Crest and Trough

• The section of the wave that rises above the
  undisturbed position is called the crest.
• That section which lies below the undisturbed
  position is called the trough.

10
Wavelength

• The wavelength is the distance from one wave top,
  or crest, to the next.

11
Frequency

• Frequency is the number of complete waves that
  pass a given point in a certain amount of time.
  (how often a wave occurs)
• This is usually described as how many waves are
  made per second, or as cycles per second.
• Example If ten waves are made per second, then
  the frequency is said to be ten cycles per
  second, written as 10 cps.
• Frequency is measured in units called Hertz (Hz).

12
Speed

• The speed of the wave is how far the wave travels
  in a given length of time.
• Ex Light waves travel much ________ than sound
  waves.
• Speed Wavelength x Frequency

13

• Sound Waves