Narrow-Angle Glass Prism, 25° x 77.5° x 77.5° Subcategory_Wash Bottles this 2-input XOR gate module

this 2-input XOR gate module shows HI and LO output states with red and green LEDs and a printed reference

sized for visible-time-scale RC charging and capacitor-driven momentary lamp-flash experiments

Open back reveals spine and posterior musculature while the head section preserves upper-body context

used to trace field lines around bar magnets and current-carrying wires

and connecting leads in one teaching package

Narrow-Angle Glass Prism, 25° x 77.5° x 77.5° Subcategory_Wash Bottles this 2-input XOR gate moduleMid apex 25 x 77. 5 x 77. 5 glass wedge prism, the apex continuing the wedge deviation series for systematic angle versus deviation comparison across geometries.