Free Exam: PHYSICS: Chap 9: Focusing - Homework #2
Number of Questions in Test: 17
Number of Questions in Preview: 5
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Register nowQuestion 1
[cmimg]0/7499281_T9PXQO1S.png[/cmimg]
When you adjust the focus on the scanner you vary the:
When you adjust the focus on the scanner you vary the:
| Type: | Multiple choice |
| Points: | 1 |
| Randomize answers: | No |
Question 2
Lateral or ______ resolution is primarily determined by the beam width profile, which depends on the transducer size, frequency and focusing.
| Type: | Multiple choice |
| Points: | 1 |
| Randomize answers: | Yes |
Question 3
The angle of beam divergence in the far field of a 2.5 MHz, unfocused, single element transducer is ______ that of a 5 MHz transducer of the same diameter.
| Type: | Multiple choice |
| Points: | 1 |
| Randomize answers: | Yes |
Question 4
The near field length of a 1 MHz unfocused, single element transducer will be ______ that of a 4 MHz transducer of the same diameter.
| Type: | Multiple choice |
| Points: | 1 |
| Randomize answers: | Yes |
Question 5
[cmimg]0/7499281_1ZWVFARB.png[/cmimg]
For a single element transducer, external focusing is most commonly done using:
For a single element transducer, external focusing is most commonly done using:
| Type: | Multiple choice |
| Points: | 1 |
| Randomize answers: | Yes |