Lecture Demonstrations
	Modern Physics
Q17: Na Light Source
Purpose: To demonstrate the properties of a specific gas in a light source.
Description:

With a good spectral light source, students can investigate energy levels using a spectrometer or qualitatively examine the atomic fingerprints through an optical slit. PASCO's light sources are the toughest, most reliable light sources available for the student lab, providing clean, high-intensity spectral light. This Low-Pressure Sodium Light Source has an output intensity of approximately 6 candela/cm2, with better than 99.5% of the visible output concentrated in the 5889 and 5895 angstrom spectral lines. Slight impurities (1% neon and argon) are added to the sodium gas to improve operating efficiency. Lamps provide 10,000+ hours of trouble-free operation. The light ports are 3.2 cm in diameter and are 22.5 cm high. This light source is supplied fully operational with built-in power supply, housing and lamp. Operating voltage is 115/220 VAC, 50/60 Hz.

Equipment List:

Storage Location: CHEMP 130A

A/V

Mechanics

Fluids

Heat

E&M

Waves

Light

Modern

Resources

Virginia Tech Physics

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