Multiple choice

Which waves are used in sonography?

  1. Micro waves

  2. Light waves

  3. Ultrasonic waves

  4. Infrared waves
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Sonography (ultrasound imaging) uses ultrasonic waves - high-frequency sound waves above human hearing range (typically 2-18 MHz). These waves can penetrate tissue and reflect off internal structures, creating images of organs and fetuses. The other options (microwaves, light waves, infrared) are electromagnetic waves, not sound.

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