The table shows the speed of ultrasound waves in different tissues in the human body.
Tissue
Speed
(m/s)
Air 330
Fat 1,450
Water 1,480
Liver 1,550
Kidney 1,560
Blood 1,570
Muscle 1,580
Bone 4,080
What happens to an ultrasound wave that moves from muscle to bone?
(1 point)
Which of the following is the best option?
a) The frequency of the wave increases.
b) The wavelength of the wave decreases.
c) The frequency of the wave decreases.
d) The wavelength of the wave increases.
1 answer
The correct answer is b) The wavelength of the wave decreases. When an ultrasound wave moves from one tissue to another with a different speed, the wavelength changes, but the frequency remains constant. In this case, since the speed of sound in muscle is lower than in bone, the wavelength of the wave will decrease as it moves from muscle to bone.