Re: questions about light
- From: Cl.Massé <postmaster@xxxxxxxxxxxxxxxxxxxxxx>
- Date: Thu, 30 Mar 2006 03:46:00 +0000 (UTC)
laura wrote:
2. How can I change the wave-length of a given light ray? What is the
greatest precision achieved for this operation?
"Hontas Farmer" <hfarmer@xxxxxxxxxxxxxx> a écrit dans le message de news:
HpCdndJ2EZY6F7XZnZ2dnUVZ_tWdnZ2d@xxxxxxxxxxxxx
The simplest example of this would be passing the light through a colored
matterial. The color of light indicates it's wavelength. This could be
done to practically any precision.
A colored material doesn't change the wavelength. It absorbs some
wavelengths
4. How many rays having different wave-length can travel (in the same
time) through an optical fiber cable?
Exactly what do you mean by rays? If your question is in principle how
high is the limit to how many signals can be put on an optical fiber the
answer is infinity. Waves of various wavelength's can be multiplexed on
the same fiber without interfering with eachother.
Except when the rays are modulated, in which case the wavelength band get a
width.
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