| View previous topic :: View next topic |
| Author |
Message |
Kelly Matthews
Guest
|
 Posted: Sat Aug 16, 2003 6:16 am Post subject: Reactions producing purple light? |
 |
|
My group is trying to compile a list of chemical reactions which lead
to the emission of photons of purple light, either in the form of a
pure wave or as a composite wave. The task appears to be harder than
we first envisaged!
Any suggestions?
Dr KM |
|
| |
|
 Back to top |
donald j haarmann
Guest
|
| Posted: Sat Aug 16, 2003 8:03 pm Post subject: Re: Reactions producing purple light? |
|
|
"Kelly Matthews" <kellymatthew69@hotmail.com>
[quote]My group is trying to compile a list of chemical reactions which lead
to the emission of photons of purple light, either in the form of a
pure wave or as a composite wave. The task appears to be harder than
we first envisaged!
Any suggestions?
Dr KM
[/quote]
------------
I remember adding chlorine gas (from HCl and KMNO4. It was not dried.) to
mercury vapour from boiling mercury producing purple if not UV light.
--
donald j haarmann - independently dubious |
|
| |
|
| Back to top |
hanson
Guest
|
| Posted: Sat Aug 16, 2003 8:47 pm Post subject: Re: Reactions producing purple light? |
|
|
"Kelly Matthews" <kellymatthew69@hotmail.com> wrote in message
news:506fe921.0308151716.45e96a15@posting.google.com...
[quote]My group is trying to compile a list of chemical reactions which lead
to the emission of photons of purple light, either in the form of a
pure wave or as a composite wave. The task appears to be harder than
we first envisaged!
Any suggestions?
Dr KM
For instance:[/quote]
Heating, exiting, ionizing Neon, or burning of Li, K or Sr will give
you purples. I wouldn>t know about the emitted wave form of the light,
but were this my project the first thing I>d do would be to look at
the "colors of the flame spectroscopy" (google) and (google groups)
and then I would check with the "pyrotechnics" (159,000 hits) which
will give you the colors and the particular reactions. Also, the old
Lange Handbook of Chemistry contains a page for colors of flames.
See also: http://faraday.physics.uiowa.edu/em/5M20.20.htm
Unless I misread your question I don>t see what "hard" there should
be to this.
hanson |
|
| |
|
| Back to top |
Marvin Margoshes
Guest
|
| Posted: Sun Aug 17, 2003 2:15 am Post subject: Re: Reactions producing purple light? |
|
|
"Kelly Matthews" <kellymatthew69@hotmail.com> wrote in message
news:506fe921.0308151716.45e96a15@posting.google.com...
[quote]My group is trying to compile a list of chemical reactions which lead
to the emission of photons of purple light, either in the form of a
pure wave or as a composite wave. The task appears to be harder than
we first envisaged!
Any suggestions?
Dr KM
[/quote]
Purple is a blue-red mixture. It isn>t a color of the spectrum. You could
possibly find a reaction that leads to the emission of a balanced mix of
blue and red photons, but your chances are better to get purple from two
separate reactions. The reactions don>t need to be in the same container if
the light from each can be combined optically with the other. |
|
| |
|
| Back to top |
Larry Smith
Guest
|
| Posted: Sun Aug 17, 2003 5:35 pm Post subject: Re: Reactions producing purple light? |
|
|
I have not seen violet light emission by a chemical process, but
it might occur.
There is an interesting experiment in which air bubbles, in water for
example, are bombsubjected to ultrasonic waves and violet light is produced
inside the bubble.
As I remember, the physics indicate the temperature inside the bubble should
be in the range of some 50,000 degrees for this to happen.( The water is
approximately room temperature).
"Kelly Matthews" <kellymatthew69@hotmail.com> wrote in message
news:506fe921.0308151716.45e96a15@posting.google.com...
[quote]My group is trying to compile a list of chemical reactions which lead
to the emission of photons of purple light, either in the form of a
pure wave or as a composite wave. The task appears to be harder than
we first envisaged!
Any suggestions?
Dr KM[/quote] |
|
| |
|
| Back to top |
Richard Henry
Guest
|
| Posted: Sun Aug 17, 2003 8:30 pm Post subject: Re: Reactions producing purple light? |
|
|
"Marvin Margoshes" <physnospamchem@cloud9.net> wrote in message
news:vjt7mutlo5cvac@corp.supernews.com...
[quote]
"Kelly Matthews" <kellymatthew69@hotmail.com> wrote in message
news:506fe921.0308151716.45e96a15@posting.google.com...
My group is trying to compile a list of chemical reactions which lead
to the emission of photons of purple light, either in the form of a
pure wave or as a composite wave. The task appears to be harder than
we first envisaged!
Any suggestions?
Dr KM
Purple is a blue-red mixture. It isn>t a color of the spectrum. You
could
possibly find a reaction that leads to the emission of a balanced mix of
blue and red photons, but your chances are better to get purple from two
separate reactions. The reactions don>t need to be in the same container
if
the light from each can be combined optically with the other.
[/quote]
Purple vs. violet? |
|
| |
|
| Back to top |
Marvin Margoshes
Guest
|
| Posted: Mon Aug 18, 2003 6:42 am Post subject: Re: Reactions producing purple light? |
|
|
"Richard Henry" <rphenry@home.com> wrote in message
news:ScN%a.2166$QT5.2032@fed1read02...
[quote]
"Marvin Margoshes" <physnospamchem@cloud9.net> wrote in message
news:vjt7mutlo5cvac@corp.supernews.com...
"Kelly Matthews" <kellymatthew69@hotmail.com> wrote in message
news:506fe921.0308151716.45e96a15@posting.google.com...
My group is trying to compile a list of chemical reactions which lead
to the emission of photons of purple light, either in the form of a
pure wave or as a composite wave. The task appears to be harder than
we first envisaged!
Any suggestions?
Dr KM
Purple is a blue-red mixture. It isn>t a color of the spectrum. You
could
possibly find a reaction that leads to the emission of a balanced mix of
blue and red photons, but your chances are better to get purple from two
separate reactions. The reactions don>t need to be in the same
container
if
the light from each can be combined optically with the other.
Purple vs. violet?
[/quote]
They are different colors.
The mnemonic for the colors of the spectrum is roy g biv. v stands for
violet. There is no p.
> |
|
| |
|
| Back to top |
Eric Lucas
Guest
|
| Posted: Mon Aug 18, 2003 9:01 am Post subject: Re: Reactions producing purple light? |
|
|
"hanson" <hanson@quick.net> wrote in message
news:Oms%a.5487$Nf3.2196@newsread4.news.pas.earthlink.net...
[quote]"Kelly Matthews" <kellymatthew69@hotmail.com> wrote in message
news:506fe921.0308151716.45e96a15@posting.google.com...
My group is trying to compile a list of chemical reactions which lead
to the emission of photons of purple light, either in the form of a
pure wave or as a composite wave. The task appears to be harder than
we first envisaged!
Any suggestions?
Dr KM
For instance:
Heating, exiting, ionizing Neon, or burning of Li, K or Sr will give
you purples.
[/quote]
Well, I know that Li and Sr both give more of a fucsia color, which, to my
eyes, looks much closer to red than purple.
Eric Lucas |
|
| |
|
| Back to top |
Richard Henry
Guest
|
| Posted: Mon Aug 18, 2003 9:06 am Post subject: Re: Reactions producing purple light? |
|
|
"Eric Lucas" <ealucas@worldnet.att.net> wrote in message
news:ddY%a.104251$0v4.7288180@bgtnsc04-news.ops.worldnet.att.net...
[quote]
"Marvin Margoshes" <physnospamchem@cloud9.net> wrote in message
news:vjt7mutlo5cvac@corp.supernews.com...
"Kelly Matthews" <kellymatthew69@hotmail.com> wrote in message
news:506fe921.0308151716.45e96a15@posting.google.com...
My group is trying to compile a list of chemical reactions which lead
to the emission of photons of purple light, either in the form of a
pure wave or as a composite wave. The task appears to be harder than
we first envisaged!
Any suggestions?
Dr KM
Purple is a blue-red mixture. It isn>t a color of the spectrum.
ROY G BIV, V being violet. I>ve never understood the difference between
purple and violet, but I suspect it would satisfy the OPs needs.
[/quote]
It is based on the color receptors in the human eye. The response to violet
light can be simulated by a mix of red an blue light (purple). |
|
| |
|
| Back to top |
G. R. L. Cowan
Guest
|
| Posted: Mon Aug 18, 2003 9:12 am Post subject: Re: Reactions producing purple light? |
|
|
Richard Henry wrote:
[quote]
"Eric Lucas" <ealucas@worldnet.att.net> wrote in message
news:ddY%a.104251$0v4.7288180@bgtnsc04-news.ops.worldnet.att.net...
"Marvin Margoshes" <physnospamchem@cloud9.net> wrote in message
news:vjt7mutlo5cvac@corp.supernews.com...
"Kelly Matthews" <kellymatthew69@hotmail.com> wrote in message
news:506fe921.0308151716.45e96a15@posting.google.com...
My group is trying to compile a list of chemical reactions which lead
to the emission of photons of purple light, either in the form of a
pure wave or as a composite wave. The task appears to be harder than
we first envisaged!
Any suggestions?
Dr KM
Purple is a blue-red mixture. It isn>t a color of the spectrum.
ROY G BIV, V being violet. I>ve never understood the difference between
purple and violet, but I suspect it would satisfy the OPs needs.
It is based on the color receptors in the human eye. The response to violet
light can be simulated by a mix of red an blue light (purple).
[/quote]
I have a digital camera whose designers seemed to think this,
and with its little monitor on the back, one can point it
at something that is truly, deeply purple, and get immediate
comparison. Oops.
--- Graham Cowan
http://www.eagle.ca/~gcowan/boron_blast.html --
how cars gain nuclear cachet |
|
| |
|
| Back to top |
Marvin Margoshes
Guest
|
| Posted: Mon Aug 18, 2003 9:25 pm Post subject: Re: Reactions producing purple light? |
|
|
"Richard Henry" <rphenry@home.com> wrote in message
news:thY%a.2304$QT5.637@fed1read02...
[quote]
"Eric Lucas" <ealucas@worldnet.att.net> wrote in message
news:ddY%a.104251$0v4.7288180@bgtnsc04-news.ops.worldnet.att.net...
"Marvin Margoshes" <physnospamchem@cloud9.net> wrote in message
news:vjt7mutlo5cvac@corp.supernews.com...
"Kelly Matthews" <kellymatthew69@hotmail.com> wrote in message
news:506fe921.0308151716.45e96a15@posting.google.com...
My group is trying to compile a list of chemical reactions which
lead
to the emission of photons of purple light, either in the form of a
pure wave or as a composite wave. The task appears to be harder than
we first envisaged!
Any suggestions?
Dr KM
Purple is a blue-red mixture. It isn>t a color of the spectrum.
ROY G BIV, V being violet. I>ve never understood the difference between
purple and violet, but I suspect it would satisfy the OPs needs.
It is based on the color receptors in the human eye. The response to
violet
light can be simulated by a mix of red an blue light (purple).
[/quote]
The eye is more easily confused by colors than are color-measuring
instruments. There are "official" color names that are described by
tristimulus values or other measurements, not by what the eye sees. For
example, see http://www.w3.org/TR/REC-html40/types.html#type-color.
I once attended a talk by Dr. Land (of Polaroid fame) on two-color
photography. He projected two images of the same object (a laundry soap box
was a favorite) on top of each other, each of which was made with one color.
To the eye, the full range of colors was visible, even when both of th
eimages were projected in yellow - but slightly different yellows. It was
amazing. |
|
| |
|
| Back to top |
|
