Mounted Fresnel Double Mirror

Device for demonstrating the wave nature of light by observing interference from reflection at two mirrors, and for calculating the wavelength of light. It has two mutually inclined front-surface mirrors of black acrylic glass in black anodised aluminium holders on a high-grade steel tripod. Total mirror area is 30 × 95 mm², the fine adjustment range is -0.3° to +0.7°, and the shaft diameter is 10 mm.