Round Convex Glass Mirror, 75mm Diameter, 150mm Focal Length archive-pending this holder keeps light shaping

this holder keeps light shaping consistent across diffraction

cord-adjustable from the top and off-center positionable for oscillation investigations

the wider focal distance favoring page-wide field of view over higher magnification

Compact 2mm-plug connecting lead in the small-scale lead family

well suited to exciting standing-wave oscillations in a Kundt's tube setup

Round Convex Glass Mirror, 75mm Diameter, 150mm Focal Length archive-pending this holder keeps light shapingPairs a 75mm aperture with a 150mm focal length on a convex glass surface, ~3. 3mm thick, the gentler curvature softening divergence while still producing reduced virtual reflections.