Water surface wave velocity with 8 cm/s. Spread out from source releases waves with a frequency of 5 Hz. Ripple of the surface water away from the origin, 30 cm and 48 cm, there will be a few degrees different phase.
A surface wave velocity 20 cm / sec. Spread out from the source wave with a frequency of 5 Hz ripple of water away from the source of 30 cm and 48 cm to a few degrees different in phase.
Surface wave speed is 20 cm / sec. Spread out from the source wave frequency 5 Seung เฮิ art pumping of water away from the source. 30 cm and 48 cm, there will be a few degrees, phase difference