Calculate the speed of different waves.
The time-displacement-diagram shows the sound waves produced by two loudspeakers A and B.
Tsunamis do threaten many costal regions.
275,000 people lost their lives by the Tsunami occured 2004 in the Indian ocean.
|distance between two maxima of a wave
|number of oscillations per second
|speed of light $c$
|rate at which light travels $c=300\cdot 10^6 $ m/s
|intensity of a wave
|an object's change in position