Laser Double-Slit STEM Box (includes 12 different "Beam-Splitters") Laser Pointer Body Colour:Black Your Barium Sulfate will be

Your Barium Sulfate will be contained in a 500 ml bottle with a child-resistant lid

It is produced naturally from interactions of cosmic rays with gases in the upper atmosphere

to whatever your standard size of paint is locally (though probably large size in Australia)

Pyrolytic graphite (Graphene) is an atomic-scale hexagonal lattice made of carbon atoms

You can easily create your own by reacting vinegar with sodium bicarbonate ("baking soda")

Laser Double-Slit STEM Box (includes 12 different "Beam-Splitters") Laser Pointer Body Colour:Black Your Barium Sulfate will beThis new and improved STEM Box includes everything you need to achieve an interference pattern with a laser in less than 60 seconds, like Thomas Young's classic double slit experiment (we love the following animation of how light is thought to propagate past a double slit, from: File: Double slit experiment. webm Wikipedia) : Your browser does not support the video tag. What's New: No wire or tape needed 12 different widths of "Beam splitter" Hand