* Wave Properties: Waves transfer energy without transferring matter. They do this by causing particles in the medium to oscillate.
* Medium Interaction: The way these particles interact with each other and with the wave's energy determines the wave's speed.
* Density and Elasticity: Two key properties of the medium that influence wave speed are:
* Density: Denser mediums have particles closer together, leading to more collisions and slower wave propagation.
* Elasticity: How readily a material returns to its original shape after being deformed affects how quickly disturbances can travel.
Examples:
* Sound: Sound travels much faster in solids (like steel) than in liquids (like water) and even faster than in gases (like air). This is because the particles in solids are packed more tightly and interact more strongly.
* Light: While light travels at a constant speed in a vacuum (the speed of light), its speed changes as it moves through different transparent mediums like water or glass. This change in speed is why light bends (refracts) when it enters a new medium.
Important Note: While the speed of a wave changes with the medium, its frequency usually remains the same. This means the wavelength of the wave will change to accommodate the new speed.
