# Homework Help: Ultrasound problem

1. Apr 14, 2005

### rlrennin

The smallest object which can be resolved with a given frequency of ultrasound in a diagnostic scanner is on the order of the wavelength of ultrasound used. If 20 mhz ultrasound is used for a scan of the eye, and the speed oft the wave is 1500 m/sec, how small an object could be detected in the eye? Do I use the equation P(4(pie)r squared) to find the answer?

2. Apr 14, 2005

### ramollari

Make use of $$\lambda = \frac{v}{f}$$