InterferenceExercises

# InterferenceExercises - Exercises 1. Two waves of amplitude...

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Exercises 1 . Two waves of amplitude A and period T and constant phase φ are superposed. If wave 1 travels 37 wavelengths farther than wave 2, then what is a possible value for the total phase difference? I. 2 π . II. π /4. III. π /2. IV. π . V. 3 π /2. 2 . Two waves of amplitude A and period T are superposed. The difference of their constant phases is p (i.e .. Δφ = φ 1 φ 2 = π ). If wave 1 travels 13.5 wavelengths farther than wave 2, then what is a possible value for the total phase difference? I. 2 π . II. π /4. III. π /2. IV. π . V. 3 π /2. 3 .Which of the following are possible differences that can create beats? I. path length difference; Δ x . II. amplitude difference; Δ A . III. frequency difference; Δ f . IV. equilibrium offset difference; Δ B . V. constant phase angle difference; Δ f. 4 . Two stretched strings are placed next to one another. One has a length of 1.5 m and the other has a length of 1.55 m. Both of the strings have their ends fixed. Both are then pulled in order to make sound such that exactly one anti-node appears in the middle. If the speed of the traveling waves on each string is 100 m/s, what is the beat frequency created by the superposition of the sounds produced by each string? 5 . Two sound waves of identical amplitude are simultaneously present in a room. If the frequencies of these sounds are 300 Hz and 310 Hz, describe precisely what you hear, and at what frequency. 6 . How would you explain to your musician friend (who is not taking physics) why she sometimes hears a wobbling sound ( i.e. , beats) when she attempts to play the same note simultaneously on two separate strings?

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7 . Which of the following total phase difference values of will give you
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## This note was uploaded on 09/01/2009 for the course PHY 7C taught by Professor Mahmud during the Spring '08 term at UC Davis.

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InterferenceExercises - Exercises 1. Two waves of amplitude...

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