Question

Which of the following are used to study the growth of fetus inside the mother's womb?
A. radio waves
B. X-rays
C. infrared waves
D. sound waves

Answer 1

Sound waves

Reason-

The sound waves bounce off the fetus like an echo, returning to the transducer. The transducer picks up the reflected waves and converts them into an electronic picture.

Answer 2

D. sound waves

Explanation:

Humans are capable of hearing sound waves of frequency between 20 Hz and 20,000 Hz only. This is called the Sonic waves. These audio frequencies are called the audible range. The sound above this range is called ultra sound and below it is called infra sound. Humans are not capable of hearing both the ultra sound and infra sound waves.

However, ultra sound scans are done to study the fetus inside the mother's womb. we call it the ultrasound scan or scan in common.

Option D is the answer.