The materials required for the experiment:
3 pieces of glow-in-the-dark stickers
1 infrared lamp
1 incandescent lamp
1 florescent lamp
1 ultraviolet lamp
For this experiment, the independent variable is the type of lamp used. The dependent variable is the time expired before for the stickers stop glowing.The constants (control variables) are the legth of time of exposure to the lamps, the power/output ratings of the lamps and the distance of the lamps from the sticker.
This experiment must be performed in a dark room.
The 3 pieces of glow-in-the-dark stickers are kept covered in a dark room. First the ultraviolet lamp is placed 1 meter directly above the stickers. The lamp is switched on, the cover over the sticker removed and the stopwatch started.
The lamp is kept on for only 1 minute. The stopwatch is kept running to record the time taken for the sticker to stop glowing. The results are recorded in the table below.
The glow-in-the-dark stickers are kept covered for another 10 minutes.
Procedures 3, 4 and 5 are repeated using the incandescent lamp, florescent lamp and finally, the ultraviolet lamp.