CHAPTER16Superposition and Standing Waves1* ·True or false: (a) The waves from two coherent sources that are radiating in phase interfere constructively everywhere in space. (b) Two wave sources that are out of phase by 180oare incoherent. (c) Interference patterns are observed only for coherent sources. (a) False (b) False (c) True 2 ·Two violinists standing a few feet apart are playing the same notes. Are there places in the room where certain notes are not heard because of destructive interference? Explain. No; the two sources are incoherent and do not give rise to interference. 3 ··Two rectangular wave pulses are traveling in opposite directions along a string. At t= 0, the two pulses are as shown in Figure 16-27. Sketch the wave functions for t= 1, 2, and 3 s .
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