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An interference pattern is set up by two point sources of the same frequency, vibrating in phase. A point on the second nodal line

An interference pattern is set up by two point sources of the same frequency, vibrating in phase. A point on the second nodal line is 25.0 cm from one source, 29.5 cm from the other. The speed of the waves is 7.5 cm/s. Calculate the wave- length and the frequency of the sources.

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