Properties Of Waves

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transverse-wave

Amplitude

Amplitude is the maximum displacement from the rest or central position, in either directions.

 

Frequency

Frequency (f) is defined as the number of complete waves produced per unit time.

  • SI unit is hertz (Hz) – 1 Hz = 1 complete cycle per second
  • Scalar quantity
  • Determined by the source (for water waves)

 

Wavelength

Wavelength (λ) is the distance between corresponding points of two consecutive waves.

  • SI unit is metre
  • Scalar quantity

 

Speed

Speed of the wave propagation is defined as the distance travelled by a wave per unit time.

  • SI unit is metre per second (m s-1)
  • Scalar quantity

 

Period

Period (T) is defined as the time taken to produce one complete wave.

  • SI unit is second (s)
  • Scalar quantity
  • $T = \frac{1}{f}$

 

Velocity

Velocity is the distance travelled by a wave in one second.

  • SI unit is metres per second (m s-1)
  • Vector quantity
  • $v = f \lambda$ (Important!)

 


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