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I0OJJ > ANTENN 02.07.10 19:03l 34 Lines 1450 Bytes #-5796 (0) @ WW
BID : 19723I0OJJ
Read: GUEST
Subj: Re: what happens to reflected energy ?
Path: DB0FHN<DB0MRW<DB0ERF<OK0NHD<OK0PHL<OK0PCC<OM0PBC<OK0PPL<DB0RES<DK0WUE<
IK6ZDE<I4UKI<I0OJJ
Sent: 100702/1632z @:I0OJJ.ILAZ.ITA.EU #:6280 $:19723i0ojj
On Jul 2, 2:35=A0pm, Cecil Moore <w5...@hotmail.com> wrote:
> On Jul 2, 3:21=A0am, "Szczepan Bialek" <sz.bia...@wp.pl> wrote:
>
> > The word "laser" is probably common =A0name for the all atificical ligh=
t
> > sources.
>
> No, it is not. From answers.com: "Definition: laser - Any of several
> devices that emit highly amplified and coherent radiation of one or
> more discrete frequencies."
>
> From Wikipedia: "Light Amplification by Stimulated Emission of
> Radiation (LASER =A0or laser) is a mechanism for emitting
> electromagnetic radiation, typically light =A0or visible light, via the
> process of stimulated emission. The emitted laser light is (usually) a
> spatially coherent, narrow low-divergence beam, that can be
> manipulated with lenses. In laser technology, 'coherent light' denotes
> a light source that produces (emits) light of in-step waves of
> identical frequency, phase,[1] =A0and polarization. The laser's beam of
> coherent light differentiates it from light sources that emit
> incoherent light beams, of random phase varying with time and
> position."
> --
> 73, Cecil, w5dxp.com
should we even bring up its close cousin, the MASER? I particularly
like this definition:
"MASER stands for Microwave Amplification by Stimulation Emission of
Radiation. A LASER is a MASER that works with higher frequency photons
in the ultraviolet or visible light spectrum"
from: http://einstein.stanford.edu/content/faqs/maser.html
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