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Radiation dampening field

  1. Feb 22, 2008 #1
    I need help with a science fair project.

    I will tell u briefly what i am trying to do. In a Science Fair, i need to prove
    that sound, radio, and light waves can be affected by destructive interference.
    I already have used my computer to lower the dB of a given sound wave by about
    85%. I have taken one speaker from the computer and angled it about 10 degrees
    toward the other, and let one speaker play the opposite continuous tone as the
    other (at 350Hz). This works fine. Radio and light waves are much more difficult to do a demonstration for, so i hope that i can JUST prove the possibility of canceling them out using just math. I read that light waves are known to spike randomly quite a bit, so it will be difficult in a real life situation to use a computer to cancel them. I also wanted to suggest to people that this may be practical when used as a shield or dampening field for radiation.

    My question is, can someone help me prove mathematically that destructive interference works with radio waves and light waves? need some actual equations form u guys

    and does anyone have any suggestions to make the project more interesting to judges

    thank you for your time everyone
  2. jcsd
  3. Feb 22, 2008 #2


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    You can use diffraction to prove that light is affected by destructive interference. As for radio waves, that's a different story.
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