Wave speed refers to the speed at which a wave travels through a medium. It is determined by the properties of the medium and the type of wave. For example, in water, the speed of a wave can be influenced by factors such as water depth and temperature. In general, wave speed can be calculated using the formula: wave speed = wavelength × frequency. Different types of waves, such as sound waves, light waves, and water waves, have different speeds. Sound waves travel faster in solids than in liquids or gases, while light waves travel fastest in a vacuum. Understanding wave speed is essential in fields like physics and engineering.