Recent content by material

  1. M

    Materials that change thermal properties by applying electrical input?

    Do such materials exist? If they do, are there materials that go from very high to very low thermal conductivity depending on electrical input?
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    Can Superconductors Shield Spacecraft from Cosmic Rays?

    What would happen to cosmic rays if you put superconductor material on the hull of a spacecraft ? Would the flux trapping effect trap the cosmic rays? Could the superconductor protect the spacecraft from cosmic rays? Could it be possible to create a superconductor magnet that can produce a...
  3. M

    If warp drive is possible, how would it affect nearby planets?

    Sorry, I wasn't sure where to post the thread, thank you for moving the thread.
  4. M

    If warp drive is possible, how would it affect nearby planets?

    If warp drive was possible, how could it affect the orbit of planets that are close to the warp? I'm not sure how to define how close. Is there a minimum distance the spaceship would need to be from other planets, so that it has no effect?
  5. M

    Can covalent bonds in water break by pushing them on a solid?

    What i am asking presented in a picture http://img818.imageshack.us/img818/239/roov.jpg
  6. M

    Can covalent bonds in water break by pushing them on a solid?

    How do water molecules behave in the presence of a static electric field? If I apply an electric field on water molecules, would they apply pressure to a solid surface (let's say a noble metal), and if so, what would happen? Could the oxygen wedge in between the atomic gaps on the surface of...
  7. M

    Question: Can elements above iron actually be clusters of smaller elements?

    I have read on the internet about superatoms and wondered whether heavier elements like gold, silver and others were actually superatoms. I don't believe they are, but it would be nice if they were because then a new enlightened form of alchemy might appear achievable. For instance, it would be...
  8. M

    Question: Can elements above iron actually be clusters of smaller elements?

    Hello, I would like to ask if elements of higher atomic number than iron might actually be clusters made up of smaller elements? Is there any evidence that rules out this possibility? The reason I am guessing that elements below iron are discrete is because of the theory that iron has its...
  9. M

    Refractive index of materials at rf frequencies to make a smaller wire antenna

    Thank you for your reply. I missed that point about reflection at the boundary between the media. Do you mean the space between the transmitting and receiving antenna or the space between the receiving antenna and the RF receiver? I'm assuming you mean the space between the antennas. I'm...
  10. M

    Refractive index of materials at rf frequencies to make a smaller wire antenna

    I'm sorry for doing this but I would really like somebody to give an answer to this question. I'm not sure if increasing the refractive index of an antenna's surroundings permits me to tune into a frequency band with an antenna that has smaller dimensions. My thinking is that wavelength is...
  11. M

    Refractive index of materials at rf frequencies to make a smaller wire antenna

    I would like to ask a few questions. Does a table of refractive indices of materials at rf frequencies (say for TV) exists? Is there a way for me to estimate it for some materials? Are the refractive indices of these materials higher? Will those materials have low absorption losses at these...
  12. M

    Question about electromagnetic metamaterials

    My question is about what possibilities exist for metamaterials, particularly if you had a composite of conventional material and metamaterial. I'd like to know how much control people could have over properties like refraction and dispersion in these metamaterials over a range of light...
  13. M

    Question about electromagnetic metamaterials

    If someone made something with alternating sections of metamaterial and conventional material, that were of equal and opposite refractive index over the spectrum of interest, what would happen to the incoming light? Would it travel at right angles to the material? If the refractive index of the...
  14. M

    Can Anomalous Dispersion Enhance Resonant Cavities for Solar Cell Applications?

    No i can't. I'm not working in sciences/engineering, I just have an interest in solar cells and some knowledge from a university education in electronics engineering. I posted on the forum because I was stuck on the unknowns I outlined earlier and I wasn't sure where to turn to next. I just like...
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    Can Anomalous Dispersion Enhance Resonant Cavities for Solar Cell Applications?

    I'm not sure how much of a difference it would make. There's a lot of issues that I can imagine would affect the outcome. If the cavity is a cube, then the sides of the cube would be 300nm/1.414... = 212nm long for a wavelength at 300nm. I'd need to consider the distance between each cavity so...
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