The diagram shows a patient having an ultrasound scan of a muscle.
The speed of ultrasound in muscle tissue is 1600 m/s.
The echo from the boundary between the muscle and the bone is received 3.0 × 10-5 s after the ultrasound is emitted.
What is the thickness of the muscle layer?
Ignore the thickness of the gel.
Use the equation: distance travelled=speed×time\text{distance travelled} = \text{speed} \times \text{time}distance travelled=speed×time
0.012 m0.012\text{ m}0.012 m
0.024 m0.024\text{ m}0.024 m
0.048 m0.048\text{ m}0.048 m
0.096 m0.096\text{ m}0.096 m