waves

waves

1. mechanical

   • need medium for its transmission
     • solid, water, or air medium
   • ripples made in a pool of water after a stone is thrown
   • caused by amplitude
   • speed of sound in air increases with the temperature.
     • require initial energy input
       • water waves, sound waves, seismic waves.
   • longitudinal and transverse waves.
   • have different shapes.

2. electromagnetic

   • have no medium to travel
     • can travel through space and vaccum
       • produced by vibration of the charged particles
         • transfer energy
     • transfer energy due to electric and magnetic fields.
   • light and radio signals.
     • created by vibrating charged particles
       • radio waves, microwaves, x-rays
   • only one shape
   • electromagnetiic spectrum
     • longest to shortest wavelength
       • least to greatest frequency and energy.
     • describes the range of light that exists .
       • Radio waves → microwaves → infrared → visible light waves → ultra violet → x-rays → Gamma Ray