Assignment Sheet: A-Level Module G485: Fields, Particles and the Frontiers of Physics

Stowmarket High School

PHYSICS DEPARTMENT

5.4.3 Ultrasound

The problems listed are given as suggestions from which your normal examples can be chosen. You need not feel bound by these if you find other books more useful. NOTE; Some of the ‘Fullick’ and ‘Bath’ bookwork is at a high level. Do not be disheartened if you experience difficulties, it was included to stretch the most able of you. Try it and if you can’t do it, ask. Assessment questions, however, are compulsory.

Work not handed in by the given deadlines and without an extension agreed by the class teacher, will result in your being asked to leave the lesson. A Concern Report will then be sent to Mr Soanes. A student should arrange to meet with the teacher for discussion prior to the next lesson and ensure the work is completed by that lesson.

Learning Objectives

Candidates should be able to:

(a) describe the properties of ultrasound / J K L
(b) describe the piezoelectric effect / J K L
(c) explain how ultrasound transducers emit and receive high-frequency sound / J K L
(d) describe the principles of ultrasound scanning / J K L
(e) describe the difference between A-scan and B-scan / J K L
(f) calculate the acoustic impedance using the equation Z = ρc / J K L
(g) calculate the fraction of reflected intensity using the equation Ir (Z2 – Z1)2
Io=(Z2 + Z1)2 / J K L
(h) describe the importance of impedance matching / J K L
(i) explain why a gel is required for effective ultrasound imaging techniques / J K L

Reading

Physics 2

Chapter 17 (pages 250 – 260)

Health Physics

Problems

Physics 2

Chapter 17 SAQ’s 1 to 10

End of Chapter 17 questions 1 – 3
“Ultrasound” worksheet questions
Assessment / “Ultrasound” End of Chapter 17 test
Deadline / As set
06/04/2011 WN