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The Da Vinci Notes

Da Vinci Notes 02: Linear Perspective and the Pyramid of Sight

The glass, the pyramid of lines and the point of diminution, from Brunelleschi's panel to my own first rule, which was wrong.

Leonardo on linear perspective: the pyramid of sight and the pane of glass, why twice the distance looks half as tall, and the error in his first rule.

Leonardo da Vinci November 8, 2026 31 min

#Leonardo da Vinci #Da Vinci Notes #Perspective #Optics #Renaissance #History of science #Geometry

The Curie Notes

Curie Notes 19: Molecular Shapes and VSEPR

Tie balloons at one knot and they find their own shape. Electrons around an atom do the same, and from that one idea we can predict the shape of a molecule.

Count electron domains, learn the five basic geometries, see why lone pairs squeeze angles, and predict molecular shapes with VSEPR in five steps.

Marie Curie November 8, 2026 28 min

#Marie Curie #Curie Notes #Chemistry #VSEPR #Molecular geometry #Bond angles #Chemical bonding