Physics Demo Number: 041

Approximate Run Time: 5 min

Fluorescence, Detergents, Whiter than White

Demo Description

Run a black light (ultraviolet light) over a material that has fluorescence properties, such as a detergent.

Scientific Principles

• Fluorescence

Equipment

• Black Light

• Ivory Soap

Equipment Location

• Equipment is located in Kit [041] on [C-2-5].

Instructions

The black light and soap show practical uses of fluorescence in the ultraviolet range.

One may comment on detergents claiming to make whites  'whiter than white'.

Writeup created by David A. Burba

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