led & eye safety

In message <MPG.1c924529347a287298995c@news.individual.net>, Keith
Williams <krw@att.bizzzz> writes
Hmm, He6O3 has a molecular weight of 72. Me thinks this idea won't
float.
Well mix it with KNO3. That should give it a lift.

--
Clive Mitchell
http://www.bigclive.com
 
In article <1109971177.936442@news-1.nethere.net>, bobmay@nethere.com
says...
Why isn't there an Ozone Hole at the NORTH Pole?
There is an ozone hole at the north pole. Like the southern hole it
waxes and wanes with the seasons.

Robert
 
On Fri, 04 Mar 2005 17:21:19 +0000, John Woodgate wrote:

I read in sci.electronics.design that Keith Williams <krw@att.bizzzz
wrote (in <MPG.1c924529347a287298995c@news.individual.net>) about 'led &
eye safety', on Fri, 4 Mar 2005:
In article <4C$7GsBBlAKCFwEA@jmwa.demon.co.uk>,
jmw@jmwa.demon.contraspam.yuk says...
I read in sci.electronics.design that Clive Mitchell
clive1@emanator.demon.co.uk> wrote (in <4IoF77AOg6JCFwc1@emanator.demon
.co.uk>) about 'led & eye safety', on Fri, 4 Mar 2005:
In message <pan.2005.03.03.23.30.29.732163@example.net>, Rich Grise
richgrise@example.net> writes
And the other thing is, that whole ozone hysteria is a crock of
propaganda.

If you really think there's a shortage of ozone, then my website has a
few details on making some more using nothing more than an old neon
transformer, some stainless steel fly screen and a bit of glass out of a
cheap picture frame. Of course, how you get the ozone up there once
you've made it is up to you. :)

Just make He6O3; the helium will make it float up to the stratosphere,
where it will conveniently decompose.

Hmm, He6O3 has a molecular weight of 72. Me thinks this idea won't
float.

But it has anomalously low density, due to the huge size of the
molecules.
If true, it certainly wouldn't make it an ideal gas.

--
Keith
 
I read in sci.electronics.design that keith <krw@att.bizzzz> wrote (in
<pan.2005.03.05.18.13.30.388804@att.bizzzz>) about 'led & eye safety',
on Sat, 5 Mar 2005:
On Fri, 04 Mar 2005 17:21:19 +0000, John Woodgate wrote:

I read in sci.electronics.design that Keith Williams <krw@att.bizzzz
wrote (in <MPG.1c924529347a287298995c@news.individual.net>) about 'led &
eye safety', on Fri, 4 Mar 2005:
In article <4C$7GsBBlAKCFwEA@jmwa.demon.co.uk>,
jmw@jmwa.demon.contraspam.yuk says...
I read in sci.electronics.design that Clive Mitchell
clive1@emanator.demon.co.uk> wrote (in <4IoF77AOg6JCFwc1@emanator.demon
.co.uk>) about 'led & eye safety', on Fri, 4 Mar 2005:
In message <pan.2005.03.03.23.30.29.732163@example.net>, Rich Grise
richgrise@example.net> writes
And the other thing is, that whole ozone hysteria is a crock of
propaganda.

If you really think there's a shortage of ozone, then my website has a
few details on making some more using nothing more than an old neon
transformer, some stainless steel fly screen and a bit of glass out of a
cheap picture frame. Of course, how you get the ozone up there once
you've made it is up to you. :)

Just make He6O3; the helium will make it float up to the stratosphere,
where it will conveniently decompose.

Hmm, He6O3 has a molecular weight of 72. Me thinks this idea won't
float.

But it has anomalously low density, due to the huge size of the
molecules.

If true, it certainly wouldn't make it an ideal gas.

The molecules are big because of the long bond-lengths, not because it
exists as a polymer.
--
Regards, John Woodgate, OOO - Own Opinions Only.
The good news is that nothing is compulsory.
The bad news is that everything is prohibited.
http://www.jmwa.demon.co.uk Also see http://www.isce.org.uk
 
On Sat, 05 Mar 2005 18:40:59 +0000, John Woodgate wrote:

I read in sci.electronics.design that keith <krw@att.bizzzz> wrote (in
pan.2005.03.05.18.13.30.388804@att.bizzzz>) about 'led & eye safety',
on Sat, 5 Mar 2005:
On Fri, 04 Mar 2005 17:21:19 +0000, John Woodgate wrote:

I read in sci.electronics.design that Keith Williams <krw@att.bizzzz
wrote (in <MPG.1c924529347a287298995c@news.individual.net>) about 'led &
eye safety', on Fri, 4 Mar 2005:
In article <4C$7GsBBlAKCFwEA@jmwa.demon.co.uk>,
jmw@jmwa.demon.contraspam.yuk says...
I read in sci.electronics.design that Clive Mitchell
clive1@emanator.demon.co.uk> wrote (in <4IoF77AOg6JCFwc1@emanator.demon
.co.uk>) about 'led & eye safety', on Fri, 4 Mar 2005:
In message <pan.2005.03.03.23.30.29.732163@example.net>, Rich Grise
richgrise@example.net> writes
And the other thing is, that whole ozone hysteria is a crock of
propaganda.

If you really think there's a shortage of ozone, then my website has a
few details on making some more using nothing more than an old neon
transformer, some stainless steel fly screen and a bit of glass out of a
cheap picture frame. Of course, how you get the ozone up there once
you've made it is up to you. :)

Just make He6O3; the helium will make it float up to the stratosphere,
where it will conveniently decompose.

Hmm, He6O3 has a molecular weight of 72. Me thinks this idea won't
float.

But it has anomalously low density, due to the huge size of the
molecules.

If true, it certainly wouldn't make it an ideal gas.

The molecules are big because of the long bond-lengths, not because it
exists as a polymer.
But if the bonds are long enough (to be relevant compared to
the space between) to make a molecule with a molecular mass of 72 float in
a "sea" of MM 32 stuff, then things aren't even close to ideal. ...'r'
must be half of what it's "supposed" to be, because of the shape of the
molecule? Paint me incredulous.

--
Keith
 
I read in sci.electronics.design that keith <krw@att.bizzzz> wrote (in
<pan.2005.03.06.04.17.45.630090@att.bizzzz>) about 'led & eye safety',
on Sat, 5 Mar 2005:
On Sat, 05 Mar 2005 18:40:59 +0000, John Woodgate wrote:

I read in sci.electronics.design that keith <krw@att.bizzzz> wrote (in
pan.2005.03.05.18.13.30.388804@att.bizzzz>) about 'led & eye safety',
on Sat, 5 Mar 2005:
On Fri, 04 Mar 2005 17:21:19 +0000, John Woodgate wrote:

I read in sci.electronics.design that Keith Williams <krw@att.bizzzz
wrote (in <MPG.1c924529347a287298995c@news.individual.net>) about 'led &
eye safety', on Fri, 4 Mar 2005:
In article <4C$7GsBBlAKCFwEA@jmwa.demon.co.uk>,
jmw@jmwa.demon.contraspam.yuk says...
I read in sci.electronics.design that Clive Mitchell
clive1@emanator.demon.co.uk> wrote (in <4IoF77AOg6JCFwc1@emanator.demon
.co.uk>) about 'led & eye safety', on Fri, 4 Mar 2005:
In message <pan.2005.03.03.23.30.29.732163@example.net>, Rich Grise
richgrise@example.net> writes
And the other thing is, that whole ozone hysteria is a crock of
propaganda.

If you really think there's a shortage of ozone, then my website has a
few details on making some more using nothing more than an old neon
transformer, some stainless steel fly screen and a bit of glass out of a
cheap picture frame. Of course, how you get the ozone up there once
you've made it is up to you. :)

Just make He6O3; the helium will make it float up to the stratosphere,
where it will conveniently decompose.

Hmm, He6O3 has a molecular weight of 72. Me thinks this idea won't
float.

But it has anomalously low density, due to the huge size of the
molecules.

If true, it certainly wouldn't make it an ideal gas.

The molecules are big because of the long bond-lengths, not because it
exists as a polymer.

But if the bonds are long enough (to be relevant compared to
the space between) to make a molecule with a molecular mass of 72 float in
a "sea" of MM 32 stuff, then things aren't even close to ideal. ...'r'
must be half of what it's "supposed" to be, because of the shape of the
molecule? Paint me incredulous.

Not quite the right word, IMHO. How about 'gullible'?(;-)
--
Regards, John Woodgate, OOO - Own Opinions Only.
The good news is that nothing is compulsory.
The bad news is that everything is prohibited.
http://www.jmwa.demon.co.uk Also see http://www.isce.org.uk
 
On Sat, 05 Mar 2005 12:14:27 +0000, Simon Waldman wrote:

rrllff@yahoo.com wrote:
It's not the speed of light that matters it's the illumination value on
the retina. A laser is a point source which creates a diffraction
pattern of very high illumination on the retina. An LED is an extended
source which does not.

AIUI the point is that LEDs have a much smaller source than any other
non-LASER light source, and so are approaching luminance levels
otherwise seen only in LASERs.

IMBW...
But let's not all forget the difference between coherent light and
"ordinary" light...

Cheers!
Rich
 
On Sun, 06 Mar 2005 07:06:20 +0000, John Woodgate wrote:

I read in sci.electronics.design that keith <krw@att.bizzzz> wrote (in
pan.2005.03.06.04.17.45.630090@att.bizzzz>) about 'led & eye safety',
on Sat, 5 Mar 2005:
On Sat, 05 Mar 2005 18:40:59 +0000, John Woodgate wrote:

I read in sci.electronics.design that keith <krw@att.bizzzz> wrote (in
pan.2005.03.05.18.13.30.388804@att.bizzzz>) about 'led & eye safety',
on Sat, 5 Mar 2005:
On Fri, 04 Mar 2005 17:21:19 +0000, John Woodgate wrote:

I read in sci.electronics.design that Keith Williams <krw@att.bizzzz
wrote (in <MPG.1c924529347a287298995c@news.individual.net>) about 'led &
eye safety', on Fri, 4 Mar 2005:
In article <4C$7GsBBlAKCFwEA@jmwa.demon.co.uk>,
jmw@jmwa.demon.contraspam.yuk says...
I read in sci.electronics.design that Clive Mitchell
clive1@emanator.demon.co.uk> wrote (in <4IoF77AOg6JCFwc1@emanator.demon
.co.uk>) about 'led & eye safety', on Fri, 4 Mar 2005:
In message <pan.2005.03.03.23.30.29.732163@example.net>, Rich Grise
richgrise@example.net> writes
And the other thing is, that whole ozone hysteria is a crock of
propaganda.

If you really think there's a shortage of ozone, then my website has a
few details on making some more using nothing more than an old neon
transformer, some stainless steel fly screen and a bit of glass out of a
cheap picture frame. Of course, how you get the ozone up there once
you've made it is up to you. :)

Just make He6O3; the helium will make it float up to the stratosphere,
where it will conveniently decompose.

Hmm, He6O3 has a molecular weight of 72. Me thinks this idea won't
float.

But it has anomalously low density, due to the huge size of the
molecules.

If true, it certainly wouldn't make it an ideal gas.

The molecules are big because of the long bond-lengths, not because it
exists as a polymer.

But if the bonds are long enough (to be relevant compared to
the space between) to make a molecule with a molecular mass of 72 float in
a "sea" of MM 32 stuff, then things aren't even close to ideal. ...'r'
must be half of what it's "supposed" to be, because of the shape of the
molecule? Paint me incredulous.

Not quite the right word, IMHO. How about 'gullible'?(;-)
That's not even a real word. No standard dictionary has an entry for the
word "gullible".

Cheers!
Rich
 
On Sun, 06 Mar 2005 16:06:53 +0000, Rich Grise wrote:

On Sun, 06 Mar 2005 07:06:20 +0000, John Woodgate wrote:

I read in sci.electronics.design that keith <krw@att.bizzzz> wrote (in
pan.2005.03.06.04.17.45.630090@att.bizzzz>) about 'led & eye safety',
on Sat, 5 Mar 2005:
On Sat, 05 Mar 2005 18:40:59 +0000, John Woodgate wrote:

I read in sci.electronics.design that keith <krw@att.bizzzz> wrote (in
pan.2005.03.05.18.13.30.388804@att.bizzzz>) about 'led & eye safety',
on Sat, 5 Mar 2005:
On Fri, 04 Mar 2005 17:21:19 +0000, John Woodgate wrote:

I read in sci.electronics.design that Keith Williams <krw@att.bizzzz
wrote (in <MPG.1c924529347a287298995c@news.individual.net>) about 'led &
eye safety', on Fri, 4 Mar 2005:
In article <4C$7GsBBlAKCFwEA@jmwa.demon.co.uk>,
jmw@jmwa.demon.contraspam.yuk says...
I read in sci.electronics.design that Clive Mitchell
clive1@emanator.demon.co.uk> wrote (in <4IoF77AOg6JCFwc1@emanator.demon
.co.uk>) about 'led & eye safety', on Fri, 4 Mar 2005:
In message <pan.2005.03.03.23.30.29.732163@example.net>, Rich Grise
richgrise@example.net> writes
And the other thing is, that whole ozone hysteria is a crock of
propaganda.

If you really think there's a shortage of ozone, then my website has a
few details on making some more using nothing more than an old neon
transformer, some stainless steel fly screen and a bit of glass out of a
cheap picture frame. Of course, how you get the ozone up there once
you've made it is up to you. :)

Just make He6O3; the helium will make it float up to the stratosphere,
where it will conveniently decompose.

Hmm, He6O3 has a molecular weight of 72. Me thinks this idea won't
float.

But it has anomalously low density, due to the huge size of the
molecules.

If true, it certainly wouldn't make it an ideal gas.

The molecules are big because of the long bond-lengths, not because it
exists as a polymer.

But if the bonds are long enough (to be relevant compared to
the space between) to make a molecule with a molecular mass of 72 float in
a "sea" of MM 32 stuff, then things aren't even close to ideal. ...'r'
must be half of what it's "supposed" to be, because of the shape of the
molecule? Paint me incredulous.

Not quite the right word, IMHO. How about 'gullible'?(;-)
Nope, I'm not buying. ;-)

That's not even a real word. No standard dictionary has an entry for the
word "gullible".
....not buying that one either:
http://www.m-w.com/cgi-bin/dictionary?book=Dictionary&va=gullible&x=0&y=0

--
Keith
 
On Sun, 06 Mar 2005 16:05:41 GMT, Rich Grise <richgrise@example.net>
wrote:

But let's not all forget the difference between coherent light and
"ordinary" light...
Such as? Actually all light is partially coherent - it is only the
amount of coherence that differs. (Sure to start a flame war I'm
afraid.)

--
Vic Roberts
http://www.RobertsResearchInc.com
To reply via e-mail:
replace xxx with vdr in the Reply to: address
or use e-mail address listed at the Web site.
 
Victor Roberts <xxx@lighting-research.com> writes:

On Sun, 06 Mar 2005 16:05:41 GMT, Rich Grise <richgrise@example.net
wrote:

But let's not all forget the difference between coherent light and
"ordinary" light...

Such as? Actually all light is partially coherent - it is only the
amount of coherence that differs. (Sure to start a flame war I'm
afraid.)
And one should note that it isn't the fact that laser light is coherent
that is the danger. It's that being coherent and appearing to originate
from a point source, this allows collimation and focusing options not
possible (or extremely difficult) with conventional light sources.

As the size of the emitter gets smaller, the risks approach those of
a laser if the beam is collimated or focused.

If it were possible to build an LED or arc lamp with an infinitesimal
source size, then the dangers would be similar.

--- sam | Sci.Electronics.Repair FAQ Mirror: http://repairfaq.ece.drexel.edu/
Repair | Main Table of Contents: http://repairfaq.ece.drexel.edu/REPAIR/
+Lasers | Sam's Laser FAQ: http://repairfaq.ece.drexel.edu/sam/lasersam.htm
| Mirror Sites: http://repairfaq.ece.drexel.edu/REPAIR/F_mirror.html

Note: These links are hopefully temporary until we can sort out the excessive
traffic on Repairfaq.org.

Important: Anything sent to the email address in the message header above is
ignored unless my full name is included in the subject line. Or, you can
contact me via the Feedback Form in the FAQs.
 
John Woodgate <jmw@jmwa.demon.contraspam.yuk> wrote in
news:Jir3OlBQWwKCFwgg@jmwa.demon.co.uk:

I read in sci.electronics.design that Simon Waldman
swaldman@firecloud.org.uk> wrote (in <ihkof2-v79.ln1@blue.firecloud.org
.uk>) about 'led & eye safety', on Sat, 5 Mar 2005:
Keith Williams wrote:

Hmm, He6O3 has a molecular weight of 72. Me thinks this idea won't
float.

Probably due to my screen font, I read He6O3 as He603. My first thought
was "my, that's an impressive isotope..."!

603He (with the '603' as a subscript) would be an isotope (atom with two
protons to make it helium and 601 neutrons to make it exceedingly
unstable, as well as heavy). He603 (again, subscript) would be an
allotrope, like C60 (buckminsterfullerene) is an allotrope of carbon, as
are graphite and diamond.
Aren't you guys talking about Helium 6 Oxygen 3, not Helium six-zero-three?
(O3 as in ozone which is what lead to this sub-thread?)

Brian
--
http://www.skywise711.com - Lasers, Seismology, Astronomy

Home of the Seismic FAQ
http://www.skywise711.com/SeismicFAQ/SeismicFAQ.html

Sed quis custodiet ipsos Custodes?
 
Rich Grise <richgrise@example.net> wrote in
news:pan.2005.03.06.16.07.10.948864@example.net:

<Snipola>
Not quite the right word, IMHO. How about 'gullible'?(;-)

That's not even a real word. No standard dictionary has an entry for the
word "gullible".
You need to get a 'real' dictionary then.

My 1969 Webster's 7th New Collegiate has that word.


Cheers!
Rich
Brian
--
http://www.skywise711.com - Lasers, Seismology, Astronomy

Home of the Seismic FAQ
http://www.skywise711.com/SeismicFAQ/SeismicFAQ.html

Sed quis custodiet ipsos Custodes?
 
On Mon, 07 Mar 2005 03:16:01 +0000, Skywise wrote:

John Woodgate <jmw@jmwa.demon.contraspam.yuk> wrote in
news:Jir3OlBQWwKCFwgg@jmwa.demon.co.uk:

I read in sci.electronics.design that Simon Waldman
swaldman@firecloud.org.uk> wrote (in <ihkof2-v79.ln1@blue.firecloud.org
.uk>) about 'led & eye safety', on Sat, 5 Mar 2005:
Keith Williams wrote:

Hmm, He6O3 has a molecular weight of 72. Me thinks this idea won't
float.

Probably due to my screen font, I read He6O3 as He603. My first thought
was "my, that's an impressive isotope..."!

603He (with the '603' as a subscript) would be an isotope (atom with two
protons to make it helium and 601 neutrons to make it exceedingly
unstable, as well as heavy). He603 (again, subscript) would be an
allotrope, like C60 (buckminsterfullerene) is an allotrope of carbon, as
are graphite and diamond.

Aren't you guys talking about Helium 6 Oxygen 3, not Helium six-zero-three?
(O3 as in ozone which is what lead to this sub-thread?)
Sure, but our monitors (or eyes) are better than Simon's, hence my
complicated RPN calculator's (CADET here) version of its molecular weight
being 72, rather than 603. I don't think the idea would float, even with
a MW of 603. ;-)

--
Keith
 
On Mon, 07 Mar 2005 03:18:43 +0000, Skywise wrote:

Rich Grise <richgrise@example.net> wrote in
news:pan.2005.03.06.16.07.10.948864@example.net:

Snipola
Not quite the right word, IMHO. How about 'gullible'?(;-)

That's not even a real word. No standard dictionary has an entry for the
word "gullible".

You need to get a 'real' dictionary then.

My 1969 Webster's 7th New Collegiate has that word.

BWAHAHAHAHAHAHAAAAAaaaaaa!!!!

Made you look!!!!!!!!!!!!!!

:p :p :p

Cheers!
Rich
 
Rich Grise <richgrise@example.net> wrote in
news:pan.2005.03.07.03.49.26.590510@example.net:

<Snipola>
Made you look!!!!!!!!!!!!!!
Yeah? So? I had trouble believing that it would NOT be in there
and wanted to confirm that suspicion.

Brian
--
http://www.skywise711.com - Lasers, Seismology, Astronomy

Home of the Seismic FAQ
http://www.skywise711.com/SeismicFAQ/SeismicFAQ.html

Sed quis custodiet ipsos Custodes?
 
I read in sci.electronics.design that keith <krw@att.bizzzz> wrote (in
<pan.2005.03.07.03.35.41.943130@att.bizzzz>) about 'led & eye safety',
on Sun, 6 Mar 2005:
Sure, but our monitors (or eyes) are better than Simon's, hence my
complicated RPN calculator's (CADET here) version of its molecular
weight being 72, rather than 603. I don't think the idea would float,
even with a MW of 603. ;-)
The actual MW is 72j, of course.
--
Regards, John Woodgate, OOO - Own Opinions Only.
The good news is that nothing is compulsory.
The bad news is that everything is prohibited.
http://www.jmwa.demon.co.uk Also see http://www.isce.org.uk
 
In article <Uy2waWBiHALCFwKq@jmwa.demon.co.uk>,
jmw@jmwa.demon.contraspam.yuk says...
I read in sci.electronics.design that keith <krw@att.bizzzz> wrote (in
pan.2005.03.07.03.35.41.943130@att.bizzzz>) about 'led & eye safety',
on Sun, 6 Mar 2005:
Sure, but our monitors (or eyes) are better than Simon's, hence my
complicated RPN calculator's (CADET here) version of its molecular
weight being 72, rather than 603. I don't think the idea would float,
even with a MW of 603. ;-)

The actual MW is 72j, of course.
Of course. Just to be sure I put it into a search engine and came up
with...

this thread. ;-)

--
Keith
 
"Rich Grise" <richgrise@example.net> wrote in message
news:pan.2005.03.07.07.43.48.950989@example.net...
On Mon, 07 Mar 2005 04:14:38 +0000, Skywise wrote:

Rich Grise <richgrise@example.net> wrote in
news:pan.2005.03.07.03.49.26.590510@example.net:

Snipola
Made you look!!!!!!!!!!!!!!

Yeah? So? I had trouble believing that it would NOT be in there
and wanted to confirm that suspicion.

Brian

OK, Ok. You have permission to retain your dignity. :)

Just to make you feel better if possible, I fell for it the first time,
too.

Here's one for parties:

"Hey! I heard that you can get the latest [$TOPICAL] joke on the
phone! Just dial 1-800-INQUIRE! It's really great!/humourous!/deep!/
insulting!/true! ..." and watch the roob look for the Q. ;-)

Also similar to "Let me show you the [$ETHNIC] trailer!" and lead
the roob around until s/he clues up. ;-)

_Two_ for parties. Thank GAWD for Vodka!

and m***h***a! - Stoned Rich

Cheers!
Rich
Technology is a wonderful thing.
To order cannabis on your mobile phone just press the hash key
 
I read in sci.electronics.design that Keith Williams <krw@att.bizzzz>
wrote (in <MPG.1c965110b77e5a7098995e@news.individual.net>) about 'led &
eye safety', on Mon, 7 Mar 2005:
In article <Uy2waWBiHALCFwKq@jmwa.demon.co.uk>,
jmw@jmwa.demon.contraspam.yuk says...
I read in sci.electronics.design that keith <krw@att.bizzzz> wrote (in
pan.2005.03.07.03.35.41.943130@att.bizzzz>) about 'led & eye safety',
on Sun, 6 Mar 2005:
Sure, but our monitors (or eyes) are better than Simon's, hence my
complicated RPN calculator's (CADET here) version of its molecular
weight being 72, rather than 603. I don't think the idea would float,
even with a MW of 603. ;-)

The actual MW is 72j, of course.

Of course. Just to be sure I put it into a search engine and came up
with...

this thread. ;-)

Immortality at last!

I worked out a mildly plausible ring structure, which would not, of
course pass muster with Uncle Al. It assumes that two He atoms can be
persuaded to share two electrons and 'donate' two others to two oxygen
atoms. In a ring structure, He6O3 has then each atom with a nominally
complete shell.

Of course, these are very mid-20th century concepts, but hey, it's a
spoof! What you want, samples? (;-)
--
Regards, John Woodgate, OOO - Own Opinions Only.
The good news is that nothing is compulsory.
The bad news is that everything is prohibited.
http://www.jmwa.demon.co.uk Also see http://www.isce.org.uk
 

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