PURPOSE: Observe the Balmer series in hydrogen.
DESCRIPTION: The discharge tube provides an electrical discharge through low-pressure hydrogen, resulting in the characteristic hydrogen spectrum. The Balmer series of lines is visible. The spectrum can be observed using hand-held holographic diffraction gratings.
REFERENCES: (PIRA 7B10.10)
EQUIPMENT: Power supply with hydrogen tube, holographic gratings.
SETUP TIME: None.
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