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Peer reviewedWebb, John le P. – Physics Teacher, 1984
Examines (in the form of a hypothetical dialog between a teacher and a student) the nature of the mantle and the spectral content of the glow which lights up both beam and mantle. These phenomena are associated with excitation of helium gas in the presence of electromagnetic and electrostatic fields. (JN)
Descriptors: College Science, Electricity, Higher Education, Inquiry
