US$ 49.98
sized as a load that visibly spins when current flows in the circuit
well suited to exciting standing-wave oscillations in a Kundt's tube setup
the wider focal distance favoring page-wide field of view over higher magnification
and a movable disc plug
Three-times life size cross section exposes cortex
Round Convex Glass Mirror, 75mm Diameter, 150mm Focal Length archive-pending sized as a load thatPairs 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.
US$ 49.98
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