24.3c Ex1 MJ20 P41 Q4 Linear Attenuation Coefficient | A2 Medical Ultrasound | CAIE A Level Physics скачать в хорошем качестве

24.3c Ex1 MJ20 P41 Q4 Linear Attenuation Coefficient | A2 Medical Ultrasound | CAIE A Level Physics

Example 1 - 9702/41/M/J/20: (a) (i) By reference to an ultrasound wave, explain what is meant by specific acoustic impedance. #9702s20p41 #Lv2 #A2reflectionImpedanceP4 #A2attenuationP4 (ii) An ultrasound wave is incident normally on the boundary between two media. The media have specific acoustic impedances Z1 and Z2. State how the ratio of intensity of ultrasound reflected from boundary over intensity of ultrasound incident on boundary depends on the relative magnitudes of Z1 and Z2. (b) (i) State what is meant by the attenuation of an ultrasound wave. (ii) A parallel beam of ultrasound is passing through a medium. The incident intensity I0 is reduced to 0.35I0 on passing through a thickness of 0.046m of the medium. Calculate the linear attenuation coefficient μ of the ultrasound beam in the medium. #A2MedicalPhysics Applications Playlist:    • Ch24 Medical Physics | CAIE 9702 A2 Physics   #A2ultrasoundWaves Playlist    • [ARCHIVED] A2 Waves: Ultrasound | CAIE 970...   Instagram Pocket Guide (  / etphysics  ) More Resources (https://9702-physics.blogspot.com/) Support us! (  / etphysics  ) Tuition/Tutoring inquiries: Email: suitlin@gmail.com Whatsapp: https://wa.me/60126679171 9702_s20_qp41 May/June 2020 #CambridgeALevelPhysics