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Q.) Define Amplitude and Wavelength, and distinguish between the two. (50 words/5 marks)

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  • Amplitude: The maximum displacement of the particles of the medium from their mean (undisturbed) position is called amplitude.
  • Unit : Meter (m)
  • Dimension : [M⁰ L¹ T⁰]
  • Wavelength : The distance between two consecutive crests or two consecutive troughs is called wavelength.
  • Unit : Meter (m)
  • Dimension : [M⁰ L¹ T⁰]

Basis of Difference

Amplitude

Wavelength

Definition

Maximum displacement from the mean position.

Distance between two consecutive crests or troughs.

Effect

It determines the energy of the wave and the loudness of sound.

It determines the frequency of the wave and the pitch of sound.

Symbol

Usually denoted by A or a.

Denoted by the Greek letter Lambda (λ).