Spectrum discharge tubes contain gases that, when ignited, emit different waves of light (or the gas’s spectral lines). This is how scientists are able to determine the gaseous make-up of planets in our solar system. This hydrogen spectrum discharge tube is approximately 10.25 inches long with electrodes sealed at both ends that are connected to lead wires protected by metal caps. It needs an induction coil spark of approximately 5cm or a suitable power supply for use. Recommended for use by adults only, this is excellent for use in classroom demonstrations or college-level science projects.
High-quality green laser pointer projects a green dot up to an incredible 2 miles away.
The Duncan Phoenix Diabolo features a stable, hard rubber shell that retains its shape.
This caffeine molecule mug makes an excellent gift!
This genuine meteorite is great for the rock collector in your family!
A combination of three of our great discovery toys, all in one package!
The cards show the name of the element, the atomic number, group, natural state and common usages!