This resource is a complete lesson that covers Medical Uses of Ultrasound for the OCR A Level Physics A course. However, it is useful for other exam boards too.
This lesson teaches the following content:
-ultrasound; longitudinal wave with frequency greater than 20 kHz
-acoustic impedance of a medium; Z = ρc
-reflection of ultrasound at a boundary; Ir / I₀ =(Z₂ - Z₁)² / (Z₂ + Z₁)²
-piezoelectric effect; ultrasound transducer as a device that emits and receives ultrasound
-advantages and disadvantages of ultrasound in medical scans
-ultrasound A-scan and B-scan
-impedance (acoustic) matching; special gel used in ultrasound scanning
-Doppler effect in ultrasound; speed of blood in the patient Δf/f = 2vcosθ/c for determining the speed v of blood.
This lesson includes:
-A full presentation including 3 example questions with worked solutions.
-A worksheet with model answers, perfect to set as homework.
-Clear visual aids and diagrams to simplify complex concepts.
-Editable PowerPoint and Word document for easy customisation.
Click on the links below to check out our FREE A Level Physics resources:
Mass, Weight & Force Basics Lesson
Net Forces & Equilibrium Lesson
Moments & Torques Lesson
Drag & Terminal Velocity Lesson
Density, Pressure & Upthrust Lesson
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