Optical study with two circles
Ruled lines drawn between two circles across a vertical and horizontal axis
The page carries a light geometric study identified in the manuscript catalogue as an optics study. Two circles, at the upper right and lower right, are joined by ruled straight lines that cross a vertical and a horizontal axis, in the manner of a ray diagram. A smaller spiral coil carrying a suspended element is sketched at the lower left. No transcribed text accompanies the drawing.
On this page
Rays drawn between two circles
Straight lines connect two circles at the right of the sheet, cutting a vertical and a horizontal reference line where they cross. The layout follows the geometry Leonardo uses to trace rays of light or lines of sight.