Suppose you read that 210-dB ultrasound is being used to pulverize cancerous tumors. You calculate the intensity in watts per centimeter squared and find it is unreasonably high ( 105 W/cm2 ). What is a possible explanation?
Solution 15CQ
Ultrasound can be used medically at different intensities. Lower intensities do not cause damage and are used for medical imaging. Higher intensities can pulverize and destroy targeted substances in the body, such as tumors
Intensity level = 210 dB
Intensity I in w/= ?
We know that =
=
w/
[Audible sound]
=
= log
I = w/