Duality and Tetrode: Difference between pages
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''This is a [[wikipedia:disambiguation|disambiguation]] page; that is, one that just points to other pages that might otherwise have the same name. If you followed a link here, you might want to go back and fix the link, so that it points to the appropriate page.'' |
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A '''tetrode''' is a two-grid [[vacuum tube]]. It has four electrodes instead of three, as in the case of a triode. |
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* In [[physics]], this refers to the case when two different models actually turn out to be equivalent. See [[duality (physics)]], [[wave-particle duality]]. |
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* In [[mathematics]], see [[dual space]], [[dual polyhedron]], [[dual number]]s, dual [[Boolean algebra]], [[dual (category theory)|dual category]], [[duality of categories]], [[Pontryagin duality]], [[De Morgan dual]] in [[logic]], duality in [[projective geometry]]. |
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* In [[Analytical Psychology]], this is an [[archetype]], that is to say, one of the deep powerful [[symbol]]s of the functioning of the [[psyche]]. |
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* In [[Alchemy]], this refers to a dynamic principle of opposing or complementary [[element]]s or [[spirit]]s. |
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See also [[dualism]], [[dual]]. |
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Revision as of 11:05, 27 December 2003
A tetrode is a two-grid vacuum tube. It has four electrodes instead of three, as in the case of a triode.