PURPOSE: Line diffraction spectrum of mercury.
DESCRIPTION: A high-pressure mercury lamp is used to produce a line spectrum. Light from the source is passed through a slit, which is focussed on a distant screen using a 20 cm focal length convex lens. The grating is positioned after the focusing lens.
REFERENCES: (PIRA 7B10.20)
EQUIPMENT: Mercury lamp with power supply, slit, 20cm focal length convex lens, and diffraction grating.
SETUP TIME: 5 min.
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