"Bill Baka" wrote
...
On 05/24/2010 01:46 AM, Szczepan Bialek wrote:

Can I rain on your parade? Light is just super high frequency RF. There
is
no such thing as a photon but scientists still use that to explain
things
in human terms for the unknowing masses. The best way I can describe a
photon is that it is one wavelength of light at any given wavelength or
frequency if you will.

It is math for it (Doulong). If a cristal is kicked it radiate diffrent
frequences. But not all and for a limited time.
Higher frequency bigger energy. But such packets are longer than one
wavelength. It is a coherency of radiation.

That explains why UV is harmful, higher frequency, while IR at longer
wavelengths is just heat.

Natural packets (photons) have probably the same length so the above is
obvious.
..
If a star or even our own sun gave off photons at the rate of burn then
it
would very soon be an ex-star.
There are very few people who can think at the needed level for this
kind
of thing, so let the argument continue. Really silly thinking that there
are red photons, green, yellow, etc.

Some substances emitt only one or only a few wavelength. Sodium emits
yellow.
(Sodium emitts yellow packets?).

Agreed.
That is why LED's emit at only one wave length. It just depends on which
elements are in the LED formula.

In one wavelength but still in packets.

But now are the fantastic lasers with the infinity "packet". Exactly like
radio waves:
""As the electrons are undergoing acceleration they radiate electromagnetic
energy in their flight direction, and as they interact with the light
already emitted, photons along its line are emitted in phase, resulting in a
"laser-like" monocromatic and coherent beam. The mirrors show in the sketch
below are superfluous, as all the light is emitted in one direction anyway."
From: http://en.wikipedia.org/wiki/Halbach_array

S*