Question

Sonograms work under the principle of Doppler Effect.

(a) False

(b) True

This question was addressed to me in a job interview.

I would like to ask this question from Magnetostriction Effect and Magnetostriction Generator in division Ultrasonics & Relativity of Engineering Physics I

Answer 1

Correct choice is (b) True

Explanation: There is an apparent change is the frequency between the incident sound waves on the foetus and the reflected sound waves from the foetus. Therefore it works on the principle of Doppler Effect.