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What a sound wave is

What a sound wave is

Longitudinal sound wave in air showing compressions, rarefactions, wavelength, particle motion, and direction of travel

Sound is produced by vibrations. In air it travels as a longitudinal wave, so particles vibrate back and forth parallel to the direction the wave moves.

Sound, ultrasound and infrasound Lesson

  1. GCSE
  2. /Physics
  3. /Sound, ultrasound and infrasound

Step-by-step lessons covering Edexcel GCSE Physics Sound, ultrasound and infrasound for Foundation and Higher tier. Each lesson works through exam-style questions in Paper 1 and Paper 2 format. Master the required practical work and core equations early, since both papers can draw on content and maths skills from across the whole specification.

Lessons