AQA 

CCEA

 Edexcel 

 OCR A 

 OCR B 

WJEC

CIE

Edexcel

1

Ultrasound and Imaging

With a frequency greater than 20,000 Hz, these waves are used to probe deep inside objects.

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AQA

CCEA

Edexcel

OCR A

OCR B

WJEC

CIE

Edexcel

or