Waves

Waves

1. Mechanical

   • all types of sound
   • move through a medium
     • sound waves move through air
     • ripples in the pond move through water
     • can be solid, liquid o gas
     • can't travel though space
   • need particles to transfer energy
     • creates sound
   • vibrations
     • transfer in energy
   • have 3 distinct shapes

2. Electromagnetic

   • are light waves
     • can be visible or invisible
     • come in all forms, depending on how to spread out the peaks are.
   • propagate energy forward
     • do not use medium
   • Electromagnetic spectrum
     • radio waves
       • longest wavelength, low frequency
         • length of a football field
     • microwaves
       • more energy, short wavelength
         • cellphones
         • radar
         • microwave oven
     • x- rays
       • pass through tissue, but not bones
     • gamma rays
       • short wavelength, high frequency, more energy
     • infrared
       • cant be seen, it feels as heat
     • visible light
       • between infrared and ultraviolet
     • ultraviolet
       • too much causes sunburn
   • have only one shape