If two waves cross and produce a wave with a larger amplitude than either of the original waves, the original waves have experienced Select one: O a. phase exchange O b. destructive interference O c. constructive interference O d. negative superimposition A tuning fork which vibrates at 256 Hz is struck. A nearby tuning fork that also naturally vibrates at 256 Hz starts to vibrate without being struck. This demonstrates the principle of Select one: O a. sonar O b. resonance O c. diffraction O d. the Doppler effect The shortest time interval during which wave motion repeats is termed the Select one: O a. period O b. frequency O c. wave pulse O d. wavelength