UIUC Physics Lecture Demo: Xmas Tree (Atomic Spectral Lines and Diffraction Gratings)

UIUC Physics
Lecture Demonstration
Database

Demo # 74

Xmas Tree (Atomic Spectral Lines and Diffraction Gratings)

ID # 74

Description:

Diffraction gratings are given to all the students who then use them to view the spectral lines of different gases. The Xmas tree holds several tubes with each tube filled with a single gas such as Hydrogen, Helium, Neon, and Mercury. An incandescent lamp is also shown for comparison to the spectrum lamps.

$Picture of Xmas Tree (Atomic Spectral Lines and Diffraction Gratings)$

Physics Concept:

Modern Physics
Atomic Physics
Spectra

The demonstration takes about 1 minute to perform.