About Photons

Discussion in 'Physics & Math' started by Kumar, Oct 20, 2004.

  1. Kumar Registered Senior Member

    Messages:
    1,990
    Hans, are your comments not from a poster of multiple forums & so applicable to you also? Any problem?

    Few people are made to resist knowledge possibilities. Visits at multiple places means satisfactory replies not provided at one place. Otherwise noone has much time to waste. Why?

    There seems to be no doubt about EM waves since these are substance specific also. But it may require hudge energy for remote/distant transmission. Mechnical waves require less energy but whether these can be substance specific or not, is to be checked>??
     
    Last edited: Nov 1, 2004
  2. Google AdSense Guest Advertisement



    to hide all adverts.
  3. MRC_Hans Skeptic Registered Senior Member

    Messages:
    835
    The problem is that you are dishonest about your motives. You are asking a lot of questions and people have the trouble of answering, thinking that you are seeking knowledge. I have been answering more of your questions than most people, and I have found that you are not interested in knowledge. All you want is something you can take out of context and claim as evidence for homeopathy.

    And no, mechanical waves (also called sound) are not substance specific (which you already know since you use the term "substance specific", which I just used in answering the same question in another forum.).



    Hans
     
  4. Google AdSense Guest Advertisement



    to hide all adverts.
  5. James R Just this guy, you know? Staff Member

    Messages:
    39,397
    Kumar,

    Photons are indistinguishable, provided they have the same frequency (or wavelength, or energy, because all these things are related).

    You mean, how close does a photon need to get to an atom to be absorbed? That's a somewhat difficult question to answer, since atoms don't have a definite size, and neither do photons. If you want a rough figure, closer than about 1 nm is probably not a bad number.

    What kinds of waves are you thinking about?

    Any atom or molecule will absorb any photon which has a frequency which corresponds to an energy gap in the atom or molecule.

    Normal sound waves are pressure waves in air. They are not quantum objects, except on atomic scales.

    We feel heat from certain types of photons because atoms and molecules in our skin absorb the photons and dissipate the energy they gain as heat (through vibration etc.).

    Sunlight contains photons which cover a very wide range of energies and frequencies, from infrared to ultraviolet. All these different photons have different effects. Infrared photons produce heat. Visible photons can be seen. UV photons can cause damage to skin cells.

    If you're really looking for evidence for how homeopathy might work, as has been said, you'd probably do better to come straight to the point rather than tiptoeing around the issue. Why don't you ask what you really want to know?
     
  6. Google AdSense Guest Advertisement



    to hide all adverts.
  7. Kumar Registered Senior Member

    Messages:
    1,990
     
    Last edited: Nov 2, 2004

Share This Page