Waves

• A wave is a disturbance that transfer energy and information with out transfer of matter.
• Types of waves:

  1. Transverse waves- It is a wave which vibrate or oscillates at 90 degrees to the direction the wave is transferring energy e.g light energy.
  2. Longitudinal waves- It is a wave which vibrates or oscillates in the same direction the wave is transferring energy e.g sound.
• Amplitude is the maximum displacement of particles of a wave from their rest position.
• Wave length is the distance between two successive crests or troughs of the wave.
• Period is the time taken by a source to produce one wave.
• Frequency is the number of waves passing a particular point per second.
• The doppler effect is the apparent change in wavelength and frequency of a wave emitted by a moving source.
• Electromagnetic waves is a continuous spectrum of waves which have the same prperties.