Quick Answer: Spectrum Tubes are gas-filled discharge tubes that glow with the characteristic colours and spectral lines of their gas when electrically excited. They are used with a compatible spectrum tubes power unit.
Last updated: October 2026
Key Features
Gas-filled discharge tubes for atomic emission spectra
Run from a compatible spectrum tubes power unit
Viewed through a spectroscope or diffraction grating to show line spectra
Lets students compare emission patterns of different gases
Technical Specifications
Specification
Value
Tube type
Gas-filled discharge tube
Primary use
Atomic emission spectrum demonstration
Required accessory
Compatible spectrum tubes power unit
About This Product
Bright line spectra from the tubes connect atomic structure and electron transitions with what students see through a spectroscope. Each tube’s colour and line pattern is recorded and compared with the others in spectroscopy and modern physics lessons. The power unit works at high voltage, so tubes are changed only with it switched off.
Frequently Asked Questions
Is a power unit needed for the Spectrum Tubes?
Yes. The tubes are placed in a compatible spectrum tubes power unit, which excites the gas so it emits light.
