A brass disc 75 mm diameter mounted on a 62 mm rod giving an overall height of 62 mm
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Diffraction Gratings replica mounted on a plate glass.. 2400 (lines/in) 7500 (lines/in) 15000 (lines/in)
Six lenses with ground & polished faces & ground edges. Comprises one each of: double convex, plano convex, converging concave-convex, diverging concave-convex, double concave, & plano concave. Supplied in a velvet lined box.
Ground & polished faces, edges ground. Size 50 mm high & 45 mm wide.
9cm x 14.5 cm , pack of 25 sheets.
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