P3.7.2.4 Estimating the Dielectric Constant of Water in the Decimeter-Wave RangeEstimating the Dielectric Constant of Water in the Decimeter Wave Range The experiment P3. 7. 2. 4 demonstrates the dielectric nature of water. In water, decimeter waves of the same frequency propagate with a shorter wavelength than in air. Therefore, a receiver dipole tuned for reception of the wavelength in air is no longer adequately tuned when placed in water. COMPONENTS OF EQUIPMENT SETS: 1 587 551 UHF wave generator 1 587 54 Dipoles in water