= Frustrated Total Internal Reflection by Harvard Natural Sciences Lecture Demonstrations
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{tag=Work by Harvard Natural Sciences Lecture Demonstrations}
Institutional demonstration page credited to <Harvard Natural Sciences Lecture Demonstrations>, issued and hosted by Harvard University. No personal author or publication or revision date is established. Referenced authors on the page are not its authors.
Official demonstration page: https://sciencedemonstrations.fas.harvard.edu/presentations/frustrated-total-internal-reflection
Cited passages: How it works: two 45–90-degree prisms, transition as air film narrows, evanescent coupling; How it works: helium-neon laser, two perpendicular screens, clamp and explicitly unmeasured air gap; Setting it up: clean contact faces, corner protection and screen visibility.
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