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Types of Sundials

Gnomon
Gnomon

The gnomon is the triangular blade in this sundial. A gnomon ([ˈnoʊmɒn], from Greek γνώμων, gnōmōn, literally: "one that knows or examines") is the part of a sundial that casts a shadow. The term has come to be used for a variety of purposes in mathematics and other fields.

Hour Line(s)
Hour Line(s)

where L is the sundial's geographical latitude (and the angle the gnomon makes with the dial plate), is the angle between a given hour-line and the noon hour-line (which always points towards true North) on the plane, and t is the number of hours before or after noon.

image: mysundial.ca
Nodus
Nodus

Media in category "Nodus-based sundials" The following 98 files are in this category, out of 98 total.

image: sundials.ru