Active element diameter and beam divergence are inversely related. 

Axial Resolution is related to pulse duration.

Phased array means adjustable or multiple focusing.

What are the two methods used for focusing a mechanical transducer?  (multiple answers)

What can you tell about the image below? Focused Transducer (2).png   

All of the following are synonyms of axial resolution except:

Which of the following cycles will produce a more accurate image with respect to axial resolution? Two transducers with the same frequency of 4MHz but different cycles.

A pair of 6 MHz probes are identical except for the active element diameters, which are 7 mm and 12 mm.  Which beam will be more compact in the far field?

Which transducer has a lower numerical value of axial resolution?

Which type of frequency transducers generally have the best range resolution?