Light Box By Singhla Scientific Industries

With adjustable slit at one end, and eyepiece mounted on a draw-tube at the other end. A composite, three element, trapezoidal prism used for dispersion. Draw tube can be adjusted to give a sharp spectrum. A bright and clear spectrum of light, approx. 16mm wide, is visible. Housed in polished, wooden case.

OPTICAL SET FOR LIGHT BOX

A.) Five perpex blocks, free of optical imperfection and sharp edges: 1 rectangle, 1 triangle 60dig.-60dig.- 60dig. 1 triangle 60dig.-60dig.-30dig. 1 triangle 90dig.-45dig.-45dig, and 1 semi-circle.

B.) Three Perspex cylindrical lenses: 1 double convex and 1 double concave, both
with the same radius of curvature, and 1 thick double-convex.