*87. For any type of wave that reaches a boundary beyond which its speed is increased, there is a maximum incident angle if incident angle 0¡M corresponds to an angle of refraction equal to 90°. If 0; > Oim , all the wave is reflected at the boundary and none is refracted, because refraction would correspond to sin 0, > 1 (where 0, is the angle of refraction), which is impossible. This phenomenon is referred to as total internal reflection. (a) Find a formula for 0jM using the law of refraction, Eq. 11-20. (b) How far from the there is to be a transmitted refracted wave. This maximum bank should a trout fisherman Şound wave stand (Fig. 11–61) so trout won't be frightened by his voice (1.8 m above the ground)? The speed of sound is about 343 m/s in air and 1440 m/s in water. FIGURE 11-61 Problem 87b.

*87. For any type of wave that reaches a boundary beyond which its speed is increased, there is a maximum incident angle if incident angle 0¡M corresponds to an angle of refraction equal to 90°. If 0; > Oim , all the wave is reflected at the boundary and none is refracted, because refraction would correspond to sin 0, > 1 (where 0, is the angle of refraction), which is impossible. This phenomenon is referred to as total internal reflection. (a) Find a formula for 0jM using the law of refraction, Eq. 11-20. (b) How far from the there is to be a transmitted refracted wave. This maximum bank should a trout fisherman Şound wave stand (Fig. 11–61) so trout won't be frightened by his voice (1.8 m above the ground)? The speed of sound is about 343 m/s in air and 1440 m/s in water. FIGURE 11-61 Problem 87b.

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter17: Sound

Section: Chapter Questions

Problem 71P: Sound is more effectively transmitted into a stethoscope by direct contact rather than through the...

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