recall and use I = I0 e^(-μx) for the attenuation of ultrasound in matter
recall and use I = I0 e^(-μx) for the attenuation of X-rays in matter
recall and use I = I0 e^(-μx) for the attenuation of ultrasound in matter
recall and use I = I0 e^(-μx) for the attenuation of X-rays in matter