The impedance of a transducer active element is 1,900,000 rayls, and the impedance of the skin is 1,400,000 rayls. What is an acceptable impedance for the matching layer?
A. 1,200,000 rayls
B. 1,400,000 rayls
C. 1,726,000 rayls
D. 1,950,000 rayls
C. 1,726,00 rayls because it is between the two impedances
(this multiple choice question has been scrambled)