33.37 • BIO Heart Sonogram. Physicians use high-frequency(f = 1–5 MHz) sound waves, called ultrasound, to image internal or-gans. The speed of these ultrasound waves is 1480 m/s in muscle and344 m/s in air. We define the index of refraction of a material for soundwaves to be the ratio of the speed of sound in air to the speed of soundin the material. Snell's law then applies to the refraction of sound waves.(a) At what angle from the normal does an ultrasound beam enter theheart if it leaves the lungs at an angle of 9.73° from the normal to theheart wall? (Assume that the speed of sound in the lungs is 344 m/s.)(b) What is the critical angle for sound waves in air incident on muscle?

Given:- Physicians use high-frequency (f = 1 MHz to 5 MHz) sound waves, called ultrasound, to image…

Ives, image d of these ultrasound waves is 1480 m/s in We define the index of refraction of a mater ratio of the speed of sound in air to the spe Snell’s law then applies to the refraction of s gle from the normal does an ultrasound be: s the lungs at an angle of 9.73° from the n

Ives, image d of these ultrasound waves is 1480 m/s in We define the index of refraction of a mater ratio of the speed of sound in air to the spe Snell’s law then applies to the refraction of s gle from the normal does an ultrasound be: s the lungs at an angle of 9.73° from the n

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Concept explainers

Dispersion of White Light

Snell’s law is a formula that gives a relation between the angle of incidence and angle of refraction and is given as:

Question

33.37 • BIO Heart Sonogram. Physicians use high-frequency
(f = 1–5 MHz) sound waves, called ultrasound, to image internal or-
gans. The speed of these ultrasound waves is 1480 m/s in muscle and
344 m/s in air. We define the index of refraction of a material for sound
waves to be the ratio of the speed of sound in air to the speed of sound
in the material. Snell's law then applies to the refraction of sound waves.
(a) At what angle from the normal does an ultrasound beam enter the
heart if it leaves the lungs at an angle of 9.73° from the normal to the
heart wall? (Assume that the speed of sound in the lungs is 344 m/s.)
(b) What is the critical angle for sound waves in air incident on muscle?

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