Your Guide to Science Fair Topics, Ideas, Experiments, and Winning Displays
Luminescence Is Cold Light Luminescence is referred to as “cold light.” This because luminescence is the name given to all forms of visible radiant energy (visible light) due to causes other than temperature. The term ‘luminescence’ was introduced in 1888 by Eilhard Wiedemann. Visible light produced by temperature changes is called incandescence. Luminescence can be [...]
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 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 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: [...]
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 [...]
ABOUT ME: Hi, I am Janice VanCleave, author of 50 best-selling science experiment books for children ages 4 through high school. I taught science for 27 years.
MORE.....
Connect With Me