In some applications of ultrasound, such as its use on cranial tissues, large reflections from the surrounding bones can produce standing waves. this is of concern because the large pressure amplitude in an antinode can damage tissues. for a frequency of 1.0 mhz, what is the distance between antinodes in tissue?
a. 0.38 mm
b. 0.75 mm
c. 1.5 mm
d. 3.0 mm