0
What is a wave?
28 January 2015
How many types
of wave have you
heard of in
everyday use?
Do they have
anything in
common?
Aims
• Describe the origin of a wave
• Explain the properties of a wave
Key terms
• Displacement: how far the
wave is disturbed from its rest
position
• Oscillation: a complete to and
fro moveme...
What is a wave?
A wave is a
disturbance
moving through a
material
What causes a wave?
• The source of a wave
is always something
that vibrates
• The material that the
wave travels through
...
Amplitude, A
• The maximum distance that each point in the
medium moves from its normal position as
the wave passes
• Meas...
Frequency, f
• This is the number of waves that pass any
point in the medium every second, so it is the
same as the number...
Wave speed, v
• This is the speed at which each wave crest
moves through the medium.
• Measured in metres per second, m/s ...
Wavelength, λ
• This is the length of a complete wave
measured from any point to the next identical
point – the distance i...
Wavelength, λ
• This is the length of a complete wave
measured from any point to the next identical
point – the distance i...
fv 
Where:
v = speed of wave / m/s
f = frequency of wave / Hz (1/s)
λ = wavelength of wave / m
How can we prove this?
1
1
330
330





msf
msv
fv


What would happen if we increased the wavelength of a wave?
Wh...
Assessment activity 2.6
• Discuss how you could model the movement
of a wave (P3)
• Construct your model or role play it t...
2.6 what is a wave
2.6 what is a wave
2.6 what is a wave
2.6 what is a wave
2.6 what is a wave
2.6 what is a wave
2.6 what is a wave
2.6 what is a wave
2.6 what is a wave
2.6 what is a wave
2.6 what is a wave
2.6 what is a wave
2.6 what is a wave
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2.6 what is a wave

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Transcript of "2.6 what is a wave"

  1. 1. What is a wave? 28 January 2015 How many types of wave have you heard of in everyday use? Do they have anything in common?
  2. 2. Aims • Describe the origin of a wave • Explain the properties of a wave
  3. 3. Key terms • Displacement: how far the wave is disturbed from its rest position • Oscillation: a complete to and fro movement; this could be going up and down or sideways
  4. 4. What is a wave? A wave is a disturbance moving through a material
  5. 5. What causes a wave? • The source of a wave is always something that vibrates • The material that the wave travels through is called the medium
  6. 6. Amplitude, A • The maximum distance that each point in the medium moves from its normal position as the wave passes • Measured in metres, m
  7. 7. Frequency, f • This is the number of waves that pass any point in the medium every second, so it is the same as the number of vibrations per second • Frequency is measured in per seconds or hertz, 1/s, s-1 or Hz
  8. 8. Wave speed, v • This is the speed at which each wave crest moves through the medium. • Measured in metres per second, m/s or ms-1
  9. 9. Wavelength, λ • This is the length of a complete wave measured from any point to the next identical point – the distance is always the same no matter which point you choose • It is measured in metres, m
  10. 10. Wavelength, λ • This is the length of a complete wave measured from any point to the next identical point – the distance is always the same no matter which point you choose • It is measured in metres, m
  11. 11. fv  Where: v = speed of wave / m/s f = frequency of wave / Hz (1/s) λ = wavelength of wave / m
  12. 12. How can we prove this? 1 1 330 330      msf msv fv   What would happen if we increased the wavelength of a wave? What would happen if we decreased the wavelength of a wave?
  13. 13. Assessment activity 2.6 • Discuss how you could model the movement of a wave (P3) • Construct your model or role play it to another group • REMEMBER: the longer the wavelength, the smaller the frequency. When calculating speed, make sure you change the prefixes
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