I have a question on one of my papers and he never showed us how to do it and I don't understand.(adsbygoogle = window.adsbygoogle || []).push({});

A 5 MHz, 1/2 dia, lat straight beam transducer in steel(velocity in sttel=.585 cm or .23 in) has a near field lenth? Can answer because I don't know how to do the math.

1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

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# I have a question on one of my classnotes

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