Question

Sonography is used to see internal organs. Which statement best explains how this technology uses wave behavior?

1) Sonography relies on refracted waves to measure the density of tissues.
2) Sonography relies on reflected waves to determine the color of objects.
3) Sonography relies on reflected waves to measure the density of tissues.
4) Sonography relies on absorbed waves to determine the size of objects.

Answer 1

Sonography uses high-frequency sound waves which get reflected back at the boundaries of different tissues within the body. These reflections are used to construct images that display the shape and density of internal structures.

Step-by-step explanation:

Sonography, or ultrasonography, utilizes the behavior of waves, specifically high-frequency sound waves, to create images of internal structures within the body. At different boundaries within the body, such as between bone and muscle, or muscle and fat, the sound waves are both reflected and transmitted. The reflected waves are then captured and used to construct an image that reveals both the shape and density of tissues. The intensity of the reflected sound relates to changes in density, with the strongest reflections occurring where density changes are greatest. Therefore, the best statement that explains how sonography uses wave behavior is: Sonography relies on reflected waves to measure the density of tissues.