Luminescence Is Cold Light Cold light is visible light produced by processes other than heating. Light sticks are an example of cold light, which is produced when chemicals are mixed together and the energy released is in the form of visible light. The firefly in the photo gives off light that like the light stick […]
Luminescence vs. Incandescence
Cold Light vs. Hot Light Luminescence is “COLD LIGHT.”Cold light is light that usually occurs at low temperatures. Luminescence can be produced in many different ways. Follow are just a few examples: chemical reactions: One example is a Glow Stick. A glow stick contains two solutions. The stick is a flexible tube. Inside this tube […]
Phosphors
Phosphors that are Phosphorescent vs. Phosphors that are Fluorescent A phosphor is a chemical substance that when energized with certain types of light energy emits visible light. Some phosphors can be energized with visible light, but all phosphors can be energized with ultraviolet rays (a.k.a. ultraviolet radiation or ultraviolet light). NOTE: Phosphors may or may […]
Classification of Beads
Classification is a term used for organizing things, such as plants and animals, rocks and minerals, or the pony beads used in this activity. First prepare a mixture of beads for each group of 4 to 5 kids. The mixtures do not have to be exactly the same, but each group should include the following: […]
Fluorescence
Question: What causes some objects to glow under a black light? Black lights give off Ultraviolet A light, which is a type of high-energy invisible light (radiation). Photons are packets of light energy. UV light photons have a higher energy than do the photons for visible light. Materials that glow under a black light contain […]