Platinum Wire in Glass Tube for Flame Testing Physics this two-gap Wheatstone bridge is

this two-gap Wheatstone bridge is the standard student apparatus for resistance comparison and verification

the broader lens capturing more page area while supporting general magnification for reading

Drawn aluminum rods at 300 by 3mm in a ten-pack

gravimetric analysis

the slim half-disc geometry letting beams enter the curved face along its radius for clean refraction-angle and TIR observations

Platinum Wire in Glass Tube for Flame Testing Physics this two-gap Wheatstone bridge isPlatinum flame test wire fused into a 5 inch borosilicate glass handle, preferred over iron or nichrome because it contributes no color of its own to the flame.