About Stemcell Science Ultraviolet Box
Explore naturally fluorescent materials and watch them illuminate under exposure to ultraviolet light, then write some secret messages to be discovered in the dark!
Science Kit includes 5 items with information cards:
LED Ultraviolet Flashlight
Uranium Glass Ball
Ultraviolet Ink Marker
Fossil Calcite Crystal
THIS IS NOT A TOY
Age Recommendation: 14+
Ultraviolet (UV) light is a range of electromagnetic frequencies that are invisible to humans. In this range, the photons that make up light have enough energy to enact permanent chemical changes. This is why sunlight and tanning beds, both of which emit UV light, can damage your skin. This LED flashlight is capable of emitting long-wave ultraviolet (UVA) light.
Human's cannot see UV wavelengths. The visible violet colour of the light is not ultraviolet. UV lights emit light from a small range of the electromagnetic spectrum, some of which is in the visible light range. Many animals can see ultraviolet light
UV Ink Marker
This marker is just like any other, except its ink is only visible under ultraviolet (UV) light.
Anything drawn will be invisible to humans until exposed to UV light. The ink contains a photo-initiator which absorbs the high energy photons of UV radiation, but since the atoms in the ink want to be at their lowest energy state, the newly absorbed energy is forced out in the form of 2 new photons, one in the infrared range (i.e. heat) and one in the visible (typically blue/green range). The visible light emitted is called fluorescence.
You can even make your own UV ink with naturally fluorescent materials such as laundry detergent, tonic water, and vitamin B-12 dissolved in vinegar.
UV ink has found use in security purposes, as an authentication tool, protecting/hiding secret messages and even cleaning assessment.
You can use this marker to make hidden labels for your belongings, write secret messages, create UV art, and more.
Uranium glass is a type of glass which contains a small amount of uranium. This causes it to glow an intense bright green under ultraviolet light.
It was once common for glass manufacturers to add small amounts of uranium oxide, about 2% by weight, to their items to achieve yellow or green coloration.
Since UV lights are now widely accessible, items made of uranium glass are now sought by many collectors. While the glass sphere included is very slightly radioactive, it is harmless to handle.
Amber is the fossilized resin of prehistoric trees.
When it was excreted in ancient forests, the molecules became polymerized and cross-linked over millions of years, creating a solid fossil. The oldest amber has been dated to 320 million years old.
This reddish amber is from the Indonesian island of Sumatra and is approximately 10–30 million years old. There are occasionally fossilized insects trapped inside Sumatran amber, but its dark color can make them difficult to spot. Try holding your specimen in front of a light to check for yourself.
Amber is very soft, only about a 2 on the Mohs scale. Sumatran amber has the added property of fluorescing bright blue under UV light.
Made in United States of America