7B13.55 - Luminescence & UV - Glow in the Dark Materials & Black Light

Code Number:
Demo Title:
Luminescence & UV - Glow in the Dark Materials & Black Light
Luminescence and Fluorescence
Area of Study:
Modern Physics
Black Light, Glow in the Dark Stars, Glow in the Dark Beads, Glow in the Dark Sheet Material.

The LED lights come in different colors.  You can show that the black light material will not be activated unless you have light with wavelengths approaching the ultraviolet.  Even a laser pointer will not activate the black light material.

Lay out the desired black light materials.  Activate with the black light wand, shut off the lights and observe the luminescent glow.

The key chain light is actually an ultraviolet LED.  This may be used to write names or illuminate certain portions of the black light sheets and materials.

Tonic water contains quinine which will fluoresce under black light.

Light sticks contain fluorescent materials.  Place an un-activated light stick under the black light and observe.

If you point a green laser pointer at a fluorescent orange object, the spot will be yellow.  You can go one step beyond this and shine the green laser pointer at a steep angle onto the glow doodler.  The spot on the glow doodler will be yellow, but the input, transmitted, and reflected beams will all be green.

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Disclaimer: These demonstrations are provided only for illustrative use by persons affiliated with The University of Iowa and only under the direction of a trained instructor or physicist.  The University of Iowa is not responsible for demonstrations performed by those using their own equipment or who choose to use this reference material for their own purpose.  The demonstrations included here are within the public domain and can be found in materials contained in libraries, bookstores, and through electronic sources.  Performing all or any portion of any of these demonstrations, with or without revisions not depicted here entails inherent risks.  These risks include, without limitation, bodily injury (and possibly death), including risks to health that may be temporary or permanent and that may exacerbate a pre-existing medical condition; and property loss or damage.  Anyone performing any part of these demonstrations, even with revisions, knowingly and voluntarily assumes all risks associated with them.