Re: basic question about light


"Randy Poe" <poespam-trap@xxxxxxxxx> wrote in message news:1171151578.342519.102300@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
On Feb 10, 2:25 pm, "Androcles" <Engin...@xxxxxxxxxxxxxxxxxxxxxx>
wrote:
"Randy Poe" <poespam-t...@xxxxxxxxx> wrote in messagenews:1171133064.163815.323460@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
I asked:
Are TV signals absorbed by aluminium molecules in the antenna?

Answered 3 times already.

Yes, so you agree that molecules do not absorb all EM radiation.

No, nor did I ever say so. However, when any particular photon is
absorbed,
it is 100% gone.

Absorbed by a hogment molecule. Ever heard of electron microscopes?


Its energy is translated into an excited state.

That's what happens in an antenna.


In the case of visual pigments, as I posted from several websites,
the energy of the photon is used to change the shape of the
pigment molecule.

My ex-girlfriend suffered from type II diabetes.
http://medweb.bham.ac.uk/easdec/laserdiabetic_retinopathy.html
I suppose as a layman trying to be a physicist you'd call that
"changing shape".
A microwave oven will change the shape of popcorn, too.
Its energy is translated into an excited state. Pop pop pop...
I call it "cooking". You have a hard time with ordinary words,
don't you, Poe?






So now that we know the answer to your question is "no", I'll
just repeat my original statement:

[A photon] is absorbed by a pigment molecule in your retina.

http://www.catalase.com/retina.gif

Those rods and cones are antennae.

No, they really aren't.

Humpty Roberts let out a great sigh.
" <sigh>", he said.
"The nuances of English. I was discussing the usage of words and
not the concepts they represent."
-- Tom Humpty Roberts tjroberts@xxxxxxxxxx
news:ZDmYf.51582$2O6.5573@xxxxxxxxxxxxxxxxxxxxxxxxxx

Yes, they really are.




They are not elephantment,
hogment or dogment molecules, nor are the optic nerve fibres attached
to the (reflective - check out a cat's eye) pigment layer.

The problem is biologists know less physics than Tom Roberts

If you'd actually read the quotes I provided, you'd learn that
vertebrate visual reception begins with a photon causing a
molecule to change shape.


I don't believe word soup, it was a load of crap. Go play
in your sandbox with one of these:
http://www.transformerland.com/image/optimusprime.jpg

That then induces a series of enzyme-catalyzed reactions.

Nothing like that happens in an antenna.

Nothing like that happens in an antenna, but they do operate.
You got something right for a change, Blind Poe.


You will find a description of photon absorption followed by molecular
shape change, followed by the enzyme cascade, in any description
of how light is transduced in the retina.

You will not find a description of rods and cones as "antennae".

Humpty Roberts let out a great sigh.
" <sigh>", he said.
"The nuances of English. I was discussing the usage of words and
not the concepts they represent."
-- Tom Humpty Roberts tjroberts@xxxxxxxxxx
news:ZDmYf.51582$2O6.5573@xxxxxxxxxxxxxxxxxxxxxxxxxx

Of course not, biologists and biochemists know very little physics
and you know none. 'Antenna' doesn't belong in their word soup,
even though that's what a rod or cone is. Same meat, different gravy.
Now I'm going to change the shape of some popcorn. Want some?

Oops, there was a pin in the nuker. It sparked. Perhaps it was
an antenna.



.

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