The wavelength of a wave is 1.5 meters when the distance between 4 consecutive crests is 6 meters.
The wavelength of a wave can be calculated as the distance between two consecutive crests or troughs. In this case, if the distance between 4 consecutive crests is 6 meters, then the wavelength of the wave is 6 meters divided by 4, which equals 1.5 meters.
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