Physics for Scientists and Engineers with Modern Physics
Physics for Scientists and Engineers with Modern Physics
10th Edition
ISBN: 9781337671729
Author: SERWAY
Publisher: Cengage
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Chapter 34, Problem 29P

(a)

To determine

The critical angle for total internal reflection of sound at the concrete-air boundary.

(b)

To determine

The medium in which sound is initially travel to undergo total internal reflection.

(c)

To determine

The reason for the concrete wall is a highly efficient mirror for sound.

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a)If the refractive index of glass is 1.55 and the refractive index of air is 1.0003, what is the critical angle for total internal reflection at the glass/air interface? b) If the refractive index of glass is 1.55 and the refractive index of the hydrated ion-selective film is 1.34, what is the critical angle for total internal reflection at the glass/film interface?
A room contains air in which the speed of sound is 343 m/s.The walls of the room are made of concrete, in which thespeed of sound is 1 850 m/s. (a) Find the critical angle fortotal internal reflection of sound at the concrete–air boundary.(b) In which medium must the sound be traveling inorder to undergo total internal reflection? (c) “A bare concretewall is a highly efficient mirror for sound.” Give evidencefor or against this statement.
Sound passes from limestone, where it moves at a speedof 4000 m/s, into another unknown material. The angle of incidence at the interface is 24° and the angle of refraction in the unknown material is 38°. (a) Calculate the speed of sound in this material. (b) Draw pictures of each situation showing the interference between the media, the normal line, the incident, reflected and refracted rays and the angles of these rays to the normal line.

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Physics for Scientists and Engineers with Modern Physics

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