Bifilar sundial
id:
bifilar-sundial-164-10433293
title:
Bifilar sundial
text:
A bifilar dial is a type of sundial invented by the German mathematician Hugo Michnik in 1922. It has two non-touching threads parallel to the dial. Usually the second thread is orthogonal-(perpendicular) to the first. The intersection of the two threads' shadows gives the local apparent time. When the threads have the correctly calculated separation, the hour-lines on the horizontal surface are uniformly drawn. The angle between successive hour-lines is constant. The hour-lines for successive h
brand slug:
wiki
category slug:
encyclopedia
description:
original url:
https://en.wikipedia.org/wiki/Bifilar_sundial
date created:
2015-02-07T10:24:11Z
date modified:
2024-08-29T00:16:48Z
main entity:
{"identifier":"Q858280","url":"https://www.wikidata.org/entity/Q858280"}
image:
{"content_url":"https://upload.wikimedia.org/wikipedia/commons/6/67/Bifilaire.png","width":832,"height":624}
fields total:
13
integrity:
15