Acoustic Tuning of the Glass Prism

I strode over to the center of the coffee table, where a heavy triangular glass prism was scattering afternoon light across an unread newspaper. An empirical dissertation on prismatic refraction and crystalline acoustic resonance was immediately imperative! Clearing my throat to deliver an introductory vocal arpeggio, I raised a slender paper finger to strike the apex of the glass, fully intent on producing a pure, crystalline tone. However, the bevel was smoother than my calculations allowed; my finger slipped with an undignified skitter, bumping the prism right onto its flat side with a dull thud that immediately smeared a brilliant rainbow across the headlines. Aha! An unassailable demonstration of refractive shift under sudden kinetic repositioning, executed flawlessly according to syllabus!