How do things glow in the Dark?

There are many types of reactions which glow in the dark, we go over phosphorescence which is most common, but there are 6 others that glow in the dark as well. You may also notice that most glow in the dark objects will glow green (which we get into that later in the blog.)

The Seven Types of Glowing Reactions

Chemiluminescence: can be seen in material objects, such as glow sticks, or in biological creatures such as fish, insects and fungus. When specific types of chemiluminescent chemicals interact, they release light which can slow down as the reactants disappear or by freezing them.

Phosphorescence: is more common in plastic, silicone, and stickers. This is an example of a silicone **glow in the dark bong** which uses phosphorescence to glow in the dark. Phosphors are made from zinc and sulfide, or strontium Aluminate, which can absorb energy in day light and then releases the energy when the light goes away. The Phorspors wont charge unless the wavelength of light is greater then the wavelength of the phosphor (green light can not charge blue light for example.)

Radioluminescence: uses radium, tridium or promethium on doped phosphors and adds energy to the phosphors, so that when the light is turned off - the object can be illuminated for longer.

Thermoluminescence: releases light through heating. Enough infrared light can be absorbed by thermoluminescent materials and then the energy is released as light.

Triboluminescence: Certain materials may glow when pressure is exerted on them. The process is believed to be facilitated by static electrical charges. Sugar, quartz, fluorite, agate and diamond can exhibit these properties.

Crystalloluminescence: light may be released in crystallization

Sonoluminescene: In this case the absorption of sound leads to ligt release.

Why Do We Make Glow In the Dark Lights Green?

Other glow in the dark colors are not bright and do not glow for long. Phosphors that emit green light are more sensitive to the human eye and appear to glow the brightest. Green phosphors are also , are cheaper and also glow the longest. Green phosphors can absorb more wavelengths of light to produce their glow while some other phosphors can only be charged with UV light.