What type of incidence is indicated at the boundary between medium 2 and medium 3?      Medium         1           2          3             4

In a sound wave, what is the name given to regions where the pressure is higher than normal?

What determines the initial amplitude of an ultrasound wave?

If the frequency of a wave is 1.54 MHz propagating through soft tissue, what is the wavelength?

What is the reciprocal of period?

Select the sequence that appears in increasing order.

The following diagram demonstrates 2 waves with the same _____________.

If the frequency of a wave increases by a factor of 10, what happens to the propagation velocity?

If the period of a wave is increased by a factor of 6, what happens to the frequency?

Using the diagram below, determine the medium where the sound beam will have the lowest intensity.