how long will it work

Discussion in 'Physics' started by aliashar86, Mar 29, 2008.

  1. aliashar86

    Thread Starter Active Member

    Nov 23, 2006
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    i have to glow bulb using salty water. so for how much time will it remain glow
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
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    I think you will find that producing current will take more than just salt water.
     
  3. aliashar86

    Thread Starter Active Member

    Nov 23, 2006
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    sorry couldn't understand
     
  4. aliashar86

    Thread Starter Active Member

    Nov 23, 2006
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    ok tell me that edison faced the problem regarding the oxygen gas due to the absence of which the filament can;t glow. so tell me that there is also no gas present inside a bulb so then how it continues to glow.
     
  5. veritas

    Active Member

    Feb 7, 2008
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    the problem that edison ran into (in my understanding - I could be completely wrong) is that in the presence of oxygen, the filament would oxidize and break/burn. It was the lack of oxygen which allowed the filament to last for an extended period of time.
     
  6. beenthere

    Retired Moderator

    Apr 20, 2004
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    Edison's bulbs were pumped down to a hard vacuum to preserve the filament. Modern bulbs are full of argon gas.

    I had assumed that the salty water was for an electrochemical cell to produce current. If not, what about the salt water is going to make the bulb glow?
     
  7. aliashar86

    Thread Starter Active Member

    Nov 23, 2006
    71
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    thans dude
     
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