P4 Higher 4.5 / 5 based on 2 ratings ? PhysicsGCSEOCR Created by: Alice LathamCreated on: 15-04-13 15:31 Sound is a longitudinal wave, what is its features ? Sound waves squash up and stretch out the arrangments of particles in materials they pass through, making compressions and rarefractions. 1 of 5 What is meant by the term compression ? Part of the wave under high pressure with lots of particles. 2 of 5 What is meant by the term rarefractions ? The part of the wave under low pressure, with fewer particles. 3 of 5 Where do you measure a wave length from ? Full cycle from crest to crest or compression to compression. 4 of 5 What is frequency ? It is the complete amount of waves in a second. It is measured in hertz. 1 hertz is one complete wave per second. 5 of 5
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