P3.1- Ultrasound 0.0 / 5 ? PhysicsWavesGCSEAQA Created by: chocolatehousesCreated on: 25-04-15 13:39 Humans can detect ultrasound between 20 and 20000 Hz 1 of 12 Above 20000 Hz is ultrasound 2 of 12 Which animals use it to communicate? bats, dolphins 3 of 12 Ultrasound scan Makes images of inside the body 4 of 12 How? the waves are partially reflected when they meet a boundary between two different media (eg tissue types) 5 of 12 Main advantage Non-ionising so safe to use all over the body 6 of 12 Disadvantages Poor image created, you have to know what to look for 7 of 12 Distance measurements the distance between interfaces in various media can be worked out by s=v x t 8 of 12 S is distance in metres 9 of 12 V is speed in metres per second 10 of 12 T is time in seconds 11 of 12 Medical uses pre natal scanning and the removal of kidney stones 12 of 12
Comments
No comments have yet been made