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Which of these transducers will have the longest focal length?
This transducer will have the greatest angle of divergence in the Fraunhofer zone.
Which transducer has a focus closest to the transducer’s face?
For an unfocused transducer, the beam’s diameter at one near zone length from the transducer is determined by?
Which of these factors affect the beam’s width in the far zone?
What is the diameter of the beam for a 5 MHz, 8 mm unfocused single element transducer, at 2 near zone lengths from the face of the transducer?