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Thread: Energy and phase cancellation

  1. #1 Energy and phase cancellation 
    Forum Professor leohopkins's Avatar
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    I have just been watching the discovery channel, about the turbo-prop plane, erm...the Saab something. anyway....it has microphone sensors which record the sound the engines make and generate a phase-cancellation noise to make it quieter for passengers.

    My question is, could this kind of phase cancellation be used for the electromagnetic spectrum too ? I.E To protect astronauts from radiation ?


    The hand of time rested on the half-hour mark, and all along that old front line of the English there came a whistling and a crying. The men of the first wave climbed up the parapets, in tumult, darkness, and the presence of death, and having done with all pleasant things, advanced across No Man's Land to begin the Battle of the Somme. - Poet John Masefield.

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  3. #2  
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    NO. It essentially generates antiphase-waves, or sound waves in opposition, which cancel (by interference).


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  4. #3  
    Forum Professor leohopkins's Avatar
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    yes, but could we not generate light waves in opposition?
    The hand of time rested on the half-hour mark, and all along that old front line of the English there came a whistling and a crying. The men of the first wave climbed up the parapets, in tumult, darkness, and the presence of death, and having done with all pleasant things, advanced across No Man's Land to begin the Battle of the Somme. - Poet John Masefield.

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    No. I think it's particle radiation that's the problem there.
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  6. #5  
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    You would, in essence, need anti-bullets, leo. Check out cosmic rays.
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