PURPOSE: Project the spectrum of a high-pressure mercury lamp.
DESCRIPTION: Light from the superpressure mercury lamp with a condenser lens and iris passes through a slit, which is imaged on a distant screen by a 20 cm focal length convex lens. A grating is placed in the light after the slit. For this one we have been using a triple grating with 2400, 7500, and 15,000 lines per inch.
The spectrum is a continuous spectrum with some brighter lines superimposed on the continuum.
REFERENCES: (PIRA 7B10.10)
EQUIPMENT: Mercury superpressure lamp with power supply, slit, 20cm focal length convex lens, and triple grating with 2400, 7500, and 15,000 lines per inch.
SETUP TIME: 5 min. (About 5 minute warm-up time.)
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