Multiple choice

Which waves are used in sonography?

  1. Microwaves

  2. Infra-red rays

  3. Sound waves

  4. Ultrasonic waves
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D Correct answer
Explanation

Sonography, also known as ultrasound imaging, utilizes high-frequency sound waves that are above the human hearing range (typically above 20,000 Hz). These ultrasonic waves reflect off internal body structures to create detailed images for medical diagnosis. Other waves like microwaves or infra-red rays are electromagnetic and serve different purposes.

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