Question 2790
{"accessible":false,"alternatives":[{"id":13613,"text":"2%"},{"id":13614,"text":"22%"},{"id":13615,"text":"41%"},{"id":13616,"text":"78%"},{"id":13617,"text":"98%"}],"archived":false,"correctAlternativeId":13615,"explanation":"\u003cp\u003e\u003cstrong\u003eReflection = [(Z\u003csub\u003e2\u003c/sub\u003e-Z\u003csub\u003e1\u003c/sub\u003e)/(Z\u003csub\u003e2\u003c/sub\u003e+Z\u003csub\u003e1\u003c/sub\u003e)]\u003csup\u003e2\u003c/sup\u003e\u003c/strong\u003e\u003c/p\u003e\u003cp\u003eReflection = [(7,8 - 1,71) / (7,8 + 1,71)]\u003csup\u003e2\u003c/sup\u003e\u003c/p\u003e\u003cp\u003eReflection = 0,41 (41%)\u003c/p\u003e","id":2790,"imageUrl":null,"imageAttribution":null,"imageAttributionCaseInfo":null,"firstQuestionPath":"/questions/2818","nextQuestionPath":"/articles/acoustic-impedance/questions/2789","relatedArticles":[{"id":55789,"title":"Reflection","link":"/articles/reflection?lang=us"}],"alsoUsedIn":[{"id":1608,"kind":"RestrictedPage","title":"Page 1608 (in no courses)","link":"https://radiopaedia.org/admin/restricted_pages/1608"},{"id":1972,"kind":"Course","title":"Imaging Physics: Ultrasound Peer Review - page 1972","link":"https://radiopaedia.org/courses/imaging-physics-ultrasound-peer-review/pages/1972"},{"id":1972,"kind":"Course","title":"Imaging Physics: Ultrasound - page 1972","link":"https://radiopaedia.org/courses/imaging-physics-ultrasound/pages/1972"}],"stem":"\u003cp\u003eWhat percentage of the incident wave intensity will be reflected at the tissue boundary between muscle (Z = 1.71) and bone (Z = 7.8)? \u003c/p\u003e","menuLinks":[{"text":"Report problem with question","url":"https://docs.google.com/forms/d/e/1FAIpQLSfO3soWYhOjJ7yErSysyCe5V4A1CqW7WK3rDA7MtAkecMGqNw/viewform?entry.1624461248\u0026entry.553583435=https://radiopaedia.org/questions/2790"}],"attemptsPercentages":[{"alternativeId":"13616","percentage":12},{"alternativeId":"13614","percentage":7},{"alternativeId":"13617","percentage":10},{"alternativeId":"13613","percentage":4},{"alternativeId":"13615","percentage":67}],"promptToLogin":false,"questionManager":false,"articleId":"acoustic-impedance"}