Project cost ($):
1 hour to prepare, 10 hours for observation
You will need access to UV/infrared lamps
Table of Contents
An ultraviolet light source (as opposed to other forms of light sources) will be able to make the glow of phosphorescence material last longer.
The lamp that produces more ultraviolet light will be able to make the glow of phosphorescence material last longer.
Phosphorescence occurs when energy in light waves is absorbed by a phosphorescent material and later released in the form of light, at a very slow rate. This slow release of light energy is what causes the glow-in-the-dark sticker to continue glowing over a period of time.
Types of lamps
Different types of lamps (mentioned below) are used to simulate different bands of light in the spectrum.
Phosphorescence, ultraviolet, infrared
The materials required for the experiment:
The glow-in-the-dark stickers will continue glowing longest and brightest after absorbing light from the ultraviolet lamp.
The hypothesis that glow-in-the-dark stickers will continue glowing the longest after the ultraviolet light and stop glowing the fastest after the infrared light is proven to be true. Infrared light and the incandescent light generate more heat and are in the lower frequency side of the light spectrum. The florescent lamp, mineral lamp and ultraviolet lamp generate light in the higher frequency spectrum. These lamps generate more ultraviolet light which is absorbed by the atoms.
The experiment can also be done using a luxmeter to measure the illuminance of the stickers.