1. Now you see it, Now you don’t W Richards The Weald School (Edexcel) 2. Some definitions… 1) Amplitude– this is “how high” the wave is: 2) Wavelength ( )–…
Topic 4 â Waves and the Earth * * Pre-natal scanning Sonar Communication between animals Ultrasound Ultrasound is the region of sound above 20,000Hz â it canât be heard…