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 in small classrooms. Due to brightness limitations, the spectrum will be shown using a video camera and rear projection TV in the lecture halls, using a holographic grating taped to the lens of the TV camera.
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Last modified on Monday, 06 January 2014 14:27