A wave is a disturbance that travels through a medium, transferring energy without transferring matter.
Characteristics:
- Amplitude: Maximum displacement of the wave from its equilibrium position. - Wavelength: Distance between two consecutive crests or troughs. - Frequency: Number of waves passing a fixed point per unit time. - Period: Time taken for one complete wave cycle. - Phase: Position of the wave in its cycle at a given point in space and time. - Speed: Rate at which the wave travels through the medium.
Types of Waves:
- Transverse waves: Medium particles move perpendicular to the direction of wave propagation. (e.g., light waves, electromagnetic waves) - Longitudinal waves: Medium particles move parallel to the direction of wave propagation. (e.g., sound waves, seismic waves) - Surface waves: Waves that travel along the surface of a boundary between two media. (e.g., water waves, ocean waves)
Properties:
- Reflection: Waves bounce off surfaces when they encounter a boundary. - Refraction: Waves change direction when passing from one medium to another. - Diffraction: Waves spread out when passing through a narrow opening. - Interference: Waves combine to produce a new wave pattern. - Polarization: Transverse waves have a specific direction of vibration.