(II) Any type of wave that reaches a boundary beyond which its speed is increased, there is a maximum incident angle if there is to be a transmitted refracted wave. This maximum incident angle θ iM corresponds to an angle of refraction equal to 90°. If θ i > θ iM , all the wave is reflected at the boundary and none is refracted, because this would correspond to sin θ r > 1 (where θ r is the angle of refraction), which is impossible. This phenomenon is referred to as total internal reflection. ( a ) Find a formula for θ iM using the law of refraction. Eq. 15–19. ( b ) How far from the bank should a trout fisherman stand (Fig. 15–38) 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.
(II) Any type of wave that reaches a boundary beyond which its speed is increased, there is a maximum incident angle if there is to be a transmitted refracted wave. This maximum incident angle θ iM corresponds to an angle of refraction equal to 90°. If θ i > θ iM , all the wave is reflected at the boundary and none is refracted, because this would correspond to sin θ r > 1 (where θ r is the angle of refraction), which is impossible. This phenomenon is referred to as total internal reflection. ( a ) Find a formula for θ iM using the law of refraction. Eq. 15–19. ( b ) How far from the bank should a trout fisherman stand (Fig. 15–38) 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.
(II) Any type of wave that reaches a boundary beyond which its speed is increased, there is a maximum incident angle if there is to be a transmitted refracted wave. This maximum incident angle θiM corresponds to an angle of refraction equal to 90°. If θi> θiM, all the wave is reflected at the boundary and none is refracted, because this would correspond to sin θr> 1 (where θr is the angle of refraction), which is impossible. This phenomenon is referred to as total internal reflection. (a) Find a formula for θiM using the law of refraction. Eq. 15–19. (b) How far from the bank should a trout fisherman stand (Fig. 15–38) 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.
ii)
The resultant intensity due to the destructive interference of two waves is 9 W/m2.
Evaluate the amplitude of each wave if the ratio of their amplitudes is 3/2.
Question 2
Chapter 15 Solutions
Physics for Scientists and Engineers with Modern Physics
University Physics with Modern Physics (14th Edition)
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