PURPOSE: Line spectrum with superposed continuum.
DESCRIPTION: This is a very bright spectral source which shows bright lines as well as a continuous spectrum. Light from the superpressure mercury source passes through a condenser lens and iris and is focused onto a slit by a 10 cm focal length cylindrical convex lens. A 20 cm focal length spherical convex lens focuses the slit onto a distant screen, with the flint glass prism placed in the light just after the spherical lens.
DO NOT REMOVE the condenser lens, because of possible UV radiation hazard.
SUGGESTIONS: NOTE: See Lecture-Demonstration personnel for operating instructions.
REFERENCES: (PIRA 7B10.20) See Demonstration Reference File for information regarding this lamp and its spectrum.
EQUIPMENT: Superpressure mercury lamp, 10cm focal length cylindrical convex lens, slit, 20cm focal length spherical convex lens, and flint glass equilateral prism.
SETUP TIME: 5 min.
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