Oi-1 Fluorescence
Published: Wednesday 15 March 2006 - Updated: Monday 28 March 2011
Aim
To demonstrate fluorescence: i.e. Certain excited atoms will emit a photon of lower energy than the incident photon that caused the transition. If the process takes place rapidly (< 10 ^-7 sec) it is called Fluorescence.
Apparatus
- U.V light source
- OMO
- Fluorescent dyes
- Uncoated fluorescent tube
- Fluorescent minerals
- Uranium glass
- Fluorescene
Diagrams
Click on pictures to enlarge.
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Fluoresence Diagram |
Description
Various materials are available that fluoresce under the action of the strong ultraviolet source.
These include
- OMO
- Uranium glass
- Fluorescene
- Minerals
- Fluorescent plastic
- Fluorescent powder
There is also a set of tubes that illustrate the action of fluorescent discharge tubes: these are
- Uncoated Mercury discharge tube
- Mercury discharge tube half coated with white fluorescent powder
-
Fluorescent tubes coated with fluorescent powders
- Green
- Blue
- Fluorescent powder representing different colour temperatures