Sound used for scanning a fetus lies above the hearing range, so it is called:
AUltramarine
BUltralight
CUltrasound
DUltraviolet
Answer & Solution
Correct answer: C. Ultrasound
1. Its frequency is too high to hear.
2. It is used for imaging inside the body.
3. That is ultrasound.
_Source: OpenStax University Physics Volume 1, Chapter 15, Oscillations._
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