[Rockhounds] Telling the UV from the Lamppost.

[Axel Emmermann]

Look at the bulb:

If it's dark blue, near black, then you have a long wave light. 366 or 368
nm

If it's white when off and very pale blue when on you may have  a blacklight
blue (which needs a filter to filter out the visible light (350 or 366 nm)
OR a mid-range UV lamp (312 or 320 nm).

If the bulb is water clear, you have a short wave lamp. That one also needs
a filter to block visible light. 253.7 nm.

Was this helpful?

Axel Emmermann
European Regional Vice President of the
Fluorescent Mineral Society
<http://www.uvminerals.org/>
=========================
Mineralogische Kring Antwerpen/Antwerp Mineralogical Society
<http://www.minerant.org/index.html>
Werkgroepleider/Workgroup leader: Fluorescerende mineralen/Fluorescent
minerals
Technische Realisaties/Engineering
My website: http://users.telenet.be/axel.emmerman/FiatLux/Index.php
 
 

> -----Oorspronkelijk bericht-----
> Van: rockhounds-bounces at lists.drizzle.com
[mailto:rockhounds-bounces at lists.drizzle.com]
> Namens jb
> Verzonden: woensdag 13 mei 2009 6:48
> Aan: Rockhounds at drizzle.com: A mailing list for rock and gem collectors
> Onderwerp: [Rockhounds] Telling the UV from the Lamppost.
> 
> I know that this is not a stupid question, because that is the one you
> don't ask, so...
> 
> I have a UV light with no markings.
> The tube itself has no markings.
> I have no immediate access to reference material that may be of any
> help. So...
> 
> What is the best way to determine what frequency the lamp is?
> 
> 
> 
> john
> 
> --
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