Prism, Optically Worked

FOR SPECTROMETERS Equilateral Two Face Polished, Equilateral Two Face Polished, Equilateral Two Face Polished, Nature of Glass R.I. Appr. 1.62 1.65 d) Double Extra Dense Flint 1.71-1.74 Nature of Glass R.I. Appr. 1.62 1.65 d) Double Extra Dense Flint 1.71-1.74 Nature of Glass R.I. Appr. 1.62 1.65 d) Double Extra Dense Flint 1.71-1.74