Properties of waves

Wave speed = frequency x wavelength A tape measure - distance Properties of waves compressions  rarefactions  Wave speed = frequency x wavelength Wave speed = 1000 Hz x 1.5 m Wave speed = 1500 m/s Period = 1 frequency = 1 1000 = 0.001 s A tape measure - distance A stop watch - time F D 6.2 Start timer when you see the sound being made A C Stop timer when you hear the echo. speed = distance time speed = 200 0.65 = 307.6923 = 310 m/s Take several time measurements, & calculate a mean value. Increase the distance. In the same direction perpendicular to

refraction Wavefronts change direction and travel slower on entering the shallow water. They refract away from the normal as they speed up again in the deeper water 4. sec Hz 660 0.5 330 660 0.0015