Re: Follow up on Help for my book
From: N:dlzc D:aol T:com \(dlzc\) (net_at_nospam.com)
Date: 06/29/04
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Date: Mon, 28 Jun 2004 21:59:45 -0700
Dear Zeke,
"Zeke" <zeke@zekesplace.com> wrote in message
news:yh5Ec.30076$eH1.14239352@newssvr28.news.prodigy.com...
> Can someone explain to me how a photon conveys information?
By delivering a package of energy.
> Specifically
> things like colors.
The amount of energy conveys "color". Within a certain range, we see it as
visible light.
> I know about pigment and about wavelengths but what is
> it about the pigment, say orange paint, that makes a photon bouncing from
> it, travel at a certain wavelength?
All other visible wavelengths are absorbed (or reemitted less well).
> Why is it orange and why does ANYTHING
> orange make a photon behave the same way?
Because of the chemical bonds which the photon excites, have that much
energy.
> In other words, how does a photon
> know something is orange when so many different things are orange?
Chemical bond.
> Fruit is
> hardly orange paint. What do these things have in common that show them
as
> orange?
Chemical bond.
> Extrapolating on this - how do photons carry information from distant
> worlds?
By travelling at c.
> When we use strong optical telescopes, how can we see things now
> that may have been gone for a million years?
By the light they emitted.
> I know light takes time to
> travel, but what exactly happens with a photon that lets us see things.
It delivers a package of energy.
> The
> photon hits a rock, bounces off, and a million years later, I see a
rock -
> why and how?
It takes a lot of photons to resolve the entire rock, and the complete
spectrum of its color. The rock itself likely has a temperature, and that
radiates to all of space. More than one photon is involved in this
process.
> A childlike example of this question would be something like -
> are picture painted on a photon so we can see them?
No. A photon could be considered a fraction of a piece of usable
information.
> I know they're not so
> how do photons carry information? Again, not too mathematical if that's
> possible. If someone can explain this to me I'll give you credit in my
book
> if you'd like.
No credit required.
David A. Smith
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