* The speed of a wave is determined by the properties of the medium it travels through. This includes factors like:
* Density: Denser mediums generally slow down waves. Think about how sound travels faster in air than in water.
* Elasticity: More elastic mediums allow waves to travel faster. This is why sound travels faster in steel than in rubber.
* Temperature: Temperature affects the density and elasticity of a medium, which in turn influences wave speed.
* Refraction: When a wave moves from one medium to another, its speed changes, causing it to bend. This bending is called refraction. You see this phenomenon when light passes from air to water, making objects appear shifted.
Example:
Imagine a light wave traveling from air into water. Air is less dense than water, so the light wave slows down when it enters the water. This change in speed causes the light wave to bend, resulting in the refraction effect.
Important Note: While the speed of a wave changes, its frequency remains constant. This means the number of wave crests passing a point per second stays the same. However, the wavelength (distance between crests) changes to accommodate the new speed.
