Waves

Waves

1. MECHANICAL

   • All types of sound including music and spoken language
   • they propagate through a medium
     • (it dosent have to be liquid or gas)
     • such as metal tracks, air or water
       • they cannot travel throguh a vacoum like space
         • this is why there is no sound outer space
           • you must have particles to transfer energy

2. ELECTROMAGNETICAL

   • they are light waves
     • but they just dont include the light we can see
     • light waves come in all forms
       • radio waves are used to propagate signals on the AM radio
       • depending on how spread out the wave peaks are
         • EXAMPLES
           • When we heat our food
           • the wave we need for cellphone services