What Are Sound Waves

Sound waves are mechanical waves that result from the vibration of particles in a medium such as air, water, or solid materials. These vibrations move in a wave pattern and carry energy from one place to another.

Key Characteristics of Sound Waves:

 1. Mechanical Nature

• Sound requires a medium (air, water, solids) to travel.

• It cannot travel through a vacuum (like outer space).

 2. Longitudinal Wave

• In sound waves, particles vibrate parallel to the direction the wave travels.

• This creates compressions (high pressure) and rarefactions (low pressure) in the medium.

 3. Speed of Sound

• Depends on the medium:

  • Air (at 20°C): ~343 m/s

  • Water: ~1500 m/s

  • Steel: ~5000 m/s

• Sound travels fastest in solids, slower in liquids, and slowest in gases.