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Science ·Class 9 Science

Draw a graph to represent a sound wave for which the density amplitude. Class 9

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· Jul 07, 2026 · Reviewed & updated Sep 17, 2026 · 1 min read

Draw a graph to represent a sound wave for which the density amplitude. Class 9


Question 1.

Draw a graph to represent a sound wave for which the density amplitude is 3 units and wavelength is 4 cm. Class 9

Answer:

  1. X-axis: Distance (in cm)
  2. Y-axis: Density
  3. A horizontal dashed line at average density (e.g., at the middle).

A sinusoidal curve where:

  1. The maximum density (crest) is 3 units above the average density line.
  2. The minimum density (trough) is 3 units below the average density line.
  3. The distance between two consecutive crests (or troughs) = 4 cm (the wavelength).
  4. Mark compressions (C) at crests and rarefactions (R) at troughs.