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> Morgan didn't want that wireless junk Good for him: It's physically impossible.

by derleth 14y ago

zotz 14y ago
You've read enough of Tesla's diaries to know that?
- derleth 14y ago
  > You've read enough of Tesla's diaries to know that? I know enough physics to know that. Tesla's diaries are irrelevant.
  - zotz 14y ago
    Marin Soljačić might disagree. http://en.wikipedia.org/wiki/Marin_Soljačić http://en.wikipedia.org/wiki/Marin_Soljačić
    - derleth 14y ago
      I'm sure he wouldn't: There's a reason his work is completely different from Tesla's. And our discussion is about Tesla's broadcast power ideas. Bringing in a completely different concept is dishonest.
      - zotz 14y ago
        The claim was that wireless is "junk". Soljačić proved it's not.
      - zotz 14y ago
        The discussion was about wireless transmission of power. It was stated that it was impossible. It's a reality. I'm refraining from further conversation. Good evening.
Ygg2 14y ago
An honest question: Why is wireless broadcast of electricity physically impossible?
- derleth 14y ago
  Because the power of electromagnetic radiation (energy per unit area perpendicular to the source) drops off proportional to the inverse square of the distance. So, at one unit away it's a reference for full power, at two units it's at one-quarter power, and three units it's at one-ninth power, and so on. This is the fatal flaw with Tesla's scheme: By simple geometry, you're pouring power into space and you need massive input to get any output at all at an appreciable distance. http://en.wikipedia.org/wiki/Inverse-square_law http://en.wikipedia.org/wiki/Inverse-square_law The WiTricity project you may hear of does things based on a completely different technical footing, which is more efficient but less broadly useful. For example, with the WiTricity technology, power receivers can't be any more than a quarter-wavelength from the transmitter, which means that they can't be any further away than a few meters. Definitely not what Tesla had in mind.

> Morgan didn't want that wireless junk Good for him: It's physically impossible.

by derleth 14y ago

> Morgan didn't want that wireless junk Good for him: It's physically impossible.

zotz 14y ago

You've read enough of Tesla's diaries to know that?

derleth 14y ago
> You've read enough of Tesla's diaries to know that? I know enough physics to know that. Tesla's diaries are irrelevant.
- zotz 14y ago
  Marin Soljačić might disagree. http://en.wikipedia.org/wiki/Marin_Soljačić http://en.wikipedia.org/wiki/Marin_Soljačić
  - derleth 14y ago
    I'm sure he wouldn't: There's a reason his work is completely different from Tesla's. And our discussion is about Tesla's broadcast power ideas. Bringing in a completely different concept is dishonest.
    - zotz 14y ago
      The claim was that wireless is "junk". Soljačić proved it's not.
    - zotz 14y ago
      The discussion was about wireless transmission of power. It was stated that it was impossible. It's a reality. I'm refraining from further conversation. Good evening.

Ygg2 14y ago

An honest question: Why is wireless broadcast of electricity physically impossible?

derleth 14y ago
Because the power of electromagnetic radiation (energy per unit area perpendicular to the source) drops off proportional to the inverse square of the distance. So, at one unit away it's a reference for full power, at two units it's at one-quarter power, and three units it's at one-ninth power, and so on. This is the fatal flaw with Tesla's scheme: By simple geometry, you're pouring power into space and you need massive input to get any output at all at an appreciable distance. http://en.wikipedia.org/wiki/Inverse-square_law http://en.wikipedia.org/wiki/Inverse-square_law The WiTricity project you may hear of does things based on a completely different technical footing, which is more efficient but less broadly useful. For example, with the WiTricity technology, power receivers can't be any more than a quarter-wavelength from the transmitter, which means that they can't be any further away than a few meters. Definitely not what Tesla had in mind.