photons and reflection
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From: Androcles on 3 Dec 2009 00:03 "Bill Taylor" <w.taylor(a)math.canterbury.ac.nz> wrote in message news:cdf336a9-30f5-4657-9322-d6f248be477d(a)z35g2000prh.googlegroups.com... > The nature of light is "?" . > > The upper part represents the wave aspect; > the lower part represents the particle aspect. > > -- Befuddled Bill > > ** They travel as waves but arrive as photons. The upper part is the magnetic aspect; the lower part is the electric aspect. http://www.androcles01.pwp.blueyonder.co.uk/AC/AC.htm If a rotating magnet turns another magnet then there is an energy transfer across empty space. One rotation corresponds to one photon. That's the nature of light.
From: BURT on 3 Dec 2009 14:41 On Dec 2, 8:54 pm, Bill Taylor <w.tay...(a)math.canterbury.ac.nz> wrote: > The nature of light is "?" . > > The upper part represents the wave aspect; > the lower part represents the particle aspect. > > -- Befuddled Bill > > ** They travel as waves but arrive as photons. Which wave is the particle in the the Electric or the Magnetic wave? This question disproves the photon. MItch Raemsch
From: Bob May on 3 Dec 2009 16:27 One of the interesting little things is using the Einstien equation E-MC*2 . This defines an EQUIVALENT mass for an energy field. This doesn't meean that a photon necessarily has mass but it does carry energy -- Bob May rmay at nethere.com http: slash /nav.to slash bobmay http: slash /bobmay dot astronomy.net
From: BURT on 3 Dec 2009 18:07 On Dec 3, 1:27 pm, "Bob May" <bob...(a)nethere.com> wrote: > One of the interesting little things is using the Einstien equation E-MC*2 . > This defines an EQUIVALENT mass for an energy field. This doesn't meean > that a photon necessarily has mass but it does carry energy > > -- > Bob May > > rmay at nethere.com > http: slash /nav.to slash bobmay > http: slash /bobmay dot astronomy.net Refelection comes at every angle and every light energy in the spectrum for white light. This means qunatization of energy coming out of the atom isn't always applicable; for example the rainbow. Mitch Raemsch
From: George Herold on 4 Dec 2009 16:58
On Dec 2, 5:19 pm, BURT <macromi...(a)yahoo.com> wrote: > On Dec 2, 2:09 pm, George Herold <ggher...(a)gmail.com> wrote: > > > > > > > On Dec 2, 4:43 pm, BURT <macromi...(a)yahoo.com> wrote: > > > > On Dec 2, 1:04 pm, George Herold <ggher...(a)gmail.com> wrote: > > > > > On Dec 2, 3:16 pm, BURT <macromi...(a)yahoo.com> wrote: > > > > > > On Dec 2, 3:43 am, p.kins...(a)ic.ac.uk wrote: > > > > > > > BURT <macromi...(a)yahoo.com> wrote: > > > > > > > What wave is the particle of light in? the electric opr > > > > > > > magnetic wave? > > > > > > > Here's how the theory can be described (simplified, obviously): > > > > > > > (a) solve Maxwell's equations for a suitable system, and get a set > > > > > > of normalizable basis functions allowing you to describe any field > > > > > > configuration. > > > > > > > (b) these basis functions usually have both electric and magnetic > > > > > > field contributions; they are usually called "mode functions", and > > > > > > tend to oscillate in space and time (although not all will). > > > > > > > (c) quantize the field inside each mode; this gives you a countable > > > > > > series of possible mode excitations. > > > > > > > (d) to describe some chosen field configuration, you combine a > > > > > > suitable set of modes containing appropriate quantum excitations. > > > > > > You may need to account for non-trivial correlations between the > > > > > > modes, and between the quantum states in the same and different > > > > > > modes. > > > > > > > There is no "particle of light". Instead there are countable > > > > > > excitations of the wave-like field modes. These modes usually > > > > > > combine both electric and magnetic contributions. > > > > > > > It's not a particle, it's a wave. But you _can_ count the > > > > > > excitations. > > > > > > > -- > > > > > > ---------------------------------+--------------------------------- > > > > > > Dr. Paul Kinsler > > > > > > Blackett Laboratory (Photonics) (ph) +44-20-759-47734 (fax) 47714 > > > > > > Imperial College London, Dr.Paul.Kins...(a)physics.org > > > > > > SW7 2AZ, United Kingdom. http://www.qols.ph.ic.ac.uk/~kinsle/ > > > > > > There are only a very few quantizations in light energy quantities of > > > > > the atom. Certainly not enough for white light we see. This does not > > > > > correspond to the reality of the full spectrum produced by the white > > > > > light. A light bulb passed through a prism produces a full spectrum of > > > > > energy levels but does not have enough quantized states in its atom to > > > > > do so. > > > > > > Mitch Raemsch- Hide quoted text - > > > > > > - Show quoted text - > > > > > Mitch, The light bulb can be thought of as a black body radiator. It > > > > doesn't matter what kind of atoms the black body is made of. All that > > > > is important is the temperature.http://en.wikipedia.org/wiki/Blackbody_radiation > > > > > George H.- Hide quoted text - > > > > > - Show quoted text - > > > > George my point is that energy transitions cannot be quantized in the > > > case of a white light. You might have a light filliment composed of a > > > few different atoms but these could not produce the full spectrum of > > > all the light energies noticed when its light is passed through a > > > prism. > > > > Evidently only sometimes is light energy quantized. > > > > Mitch Raemsch- Hide quoted text - > > > > - Show quoted text - > > > Ahh, there are two types of quantization here. For an atom you have > > quantized electron states. The photon emmited when the atom goes from > > one state to the other has a particular 'quantized' frequency. But > > this is just because of the uderlying quantized electron states. > > There is then the quantization of the EM field that is called a > > photon....(And I'll never call it a particle again.) When you measure > > light you either see one photon or none....never some fraction of a > > photon. (OK, most times you see lots of photons, but always an > > interger number.) > > > George H. > > > (I was afraid you were going to ask, "From where comes the photon > > emmited by a black body?" I don't have a good picture of that > > process.)- Hide quoted text - > > > - Show quoted text - > > The electron state is simply which of the 4 shells it is in. There are > only 4 fundamental sizes to the atom because of these round shells > that science calles energy levels of the electron. > > White light from a surface composed of a few different atoms is > evidence that emmision is not always quantized. > > Mitch Raemsch- Hide quoted text - > > - Show quoted text - Hmmm, Mitch if you are really interested in this stuff you'll have to take a class (well there are QM classes in video on the web.) and work through the standard problems. There are an infite number of energy states of an atom. At the larger quantum numbers the states have almost the same energy and we then just call them 'the continum' (or some such term.) I have no idea where the 4 number came from but it's wrong. George H. |