The secrets of a sinister glow
Uncover the secrets of a sinister glow!
Warning! Only under adult supervision.
- phosphorescent paper;
- ultraviolet light;
- fluorescent ink;
- play money;
Ominous Glow Keeper: Cut some ghosts out of phosphorescent paper, leave them under a light for an hour, then turn off the lights. The figures glow!
Secrets of invisible ink: Write a message on some play money and give it to a friend along with a UV light. Your friend can use the UV light to read the message, then follow your instructions!
Ominous Glow Keeper: All substances partially absorb light energy. Some of them use that energy to glow for a long time after absorbing it, slowly re-emitting the light energy they have taken in. Such substances are said to be phosphorescent. At some point, the energy runs out, and they stop glowing.
Secrets of invisible ink: The fluorescent substances in the ink absorb ultraviolet light and immediately emit visible light – light with a longer wavelength and less energy. This is due to the fact that the ink irretrievably absorbs some of the light energy.
Exciting and safe experiments await you in the MEL Science subscription!