Physics A-Level
A-scan
What A-scan means in Physics A-Level, as defined for AQA, OCR.
Definitions of A-scan
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Reference: OCR
Displays the amplitude of reflected ultrasound pulses against time or depth on a single axis, producing a one-dimensional trace with peaks corresponding to boundaries between media.
A one-dimensional amplitude–time display in which a pulse is emitted and echoes from boundaries are shown as vertical spikes.
Topics that use A-scan
- Ultrasound imaging (A-level only) (AQA A-Level)
- Using ultrasound (OCR A-Level)
Related terms
- Acoustic impedance
- B-scan
- Coupling gel
- Intensity reflection coefficient
- Piezoelectric effect
- Acoustic impedance and reflection
- Acoustic impedance mismatch
- Acoustic matching
Using A-scan in the exam
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