Diffraction Spectra - Miscellaneous Tubes

Purpose

Show several atomic and molecular line spectra.

Equipment

Spectral tubes with power supply, hand-held expendable replica gratings, holographic gratings.

Images

n2-05

Description

Use hand-held diffraction gratings to show a number of line spectra. Many of these tubes are rather weak, so this one works best for smaller groups where observers can get close to the light. Sources, which must be inserted and removed as needed by the instructor, include: hydrogen, helium, neon, argon, xenon, mercury vapor, iodine, chlorine, and oxygen (atomic spectra), carbon dioxide, water vapor, and air (molecular spectra). The standard cheap replica gratings may not produce a sufficiently bright spectrum, so brighter but less dispersive and more expensive mounted holographic gratings are

References

(PIRA 7B10.12)