1.

Which of the following is the correct expression for transition band f?

A. ( <sub>p</sub> <sub>s</sub>)/2
B. ( <sub>p</sub>+ <sub>s</sub>)/2
C. ( <sub>p</sub>. <sub>s</sub>)/2
D. ( <sub>s</sub> <sub>p</sub>)/2
Answer» E.


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