Our BESTO Michelson Interferometer of Model MI-05 is a precision optical instrument designed for advanced physics experiments, particularly in the study of interference patterns and the measurement of monochromatic light wavelengths. Technical Specication Beam Splitter: Rectangular (50 × 39 × 7 mm), 50/50 reflection/transmission ratio, flatness l/4 at 632 nm. Compensator Plate: Same dimensions and flatness as the beam splitter. Mirrors (M1 & M2): Circular, 30 mm diameter × 10 mm thickness.