The gnomon is the simplest sundial

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2018-07-21 03:00:19

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We All use for hours. The creation of modern devices greatly facilitate human life. Earlier monitor was also required, so there were other watches. And called them interesting word ‘gnomon’. From Greek it is translated as “index”. What they were, how they were used previously? About this we and tell.

The gnomon - pointer precise true-time

The gnomon – is an ancient astronomical tool that allows for the least length of the shadow of its columns to define the angular height of the sun. These kind of watches were created a long time ago, they helped to determine the time on a Sunny day. The sun here plays a key role, more precisely, the shadow from it. In other words, the gnomon-a simple sundial.

In Addition to the columns and the shadows from it the watch is a dial, which allows you to more accurately determine the time and, accordingly, the height of the sun.

sundial

At various points of the Earth the division of the dial will be different. It depends on the point where you want to set the gnomon. In astronomy, this device is intended to determine the height of the sun. During the day it is at different points, respectively, the shadow cast by objects are too different. This allows you to know the time. A determination is made in degrees of arc. Azimuth and altitude of sun – that's what allows to determine it exactly. In addition, the shadow of the gnomon to find out, for example, the equinox, as with any date. Look similar watch can different. Most of all, it is a circle on the plane, and attached to the triangle. On the sundial easy to tell the time, but how accurate is it?

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The sundial differ from regular?

A sundial or always in a hurry, or more behind the present. Only four times a year, they show absolutely right time, and in the remaining days do not coincide with it. Actually, the sundial shows the correct time, not the wrist, invented by people. But still, to better navigate in time using a special graph, which is usually placed near the clock. Usually in the sundials there are two ways to know the time.

The shadow of the gnomon - pointer time

A Gnomon is called a watch, but if to speak more precisely, it's just part of them, namely the object casting the shadow. Often – it is a triangle. The geographical latitude determines the angle of it. The gnomon is always directed to the North. The exact hours two gnomon. One face is a curved contour.

Simplest sundial

It is Made with the purpose to avoid confusion, for some of the faces to measure the time, and it looks pretty aesthetically pleasing. Also, for aesthetics you can make the gnomon is slightly bent. Most importantly, face for the recording time was direct.

Variety of solar hours

Sometimes created watches, which are three of the gnomon. First the gnomon is the one that measures the local time, the second measures the waist, and the third is needed to measure the azimuth of the sun.

Interesting about the sundial

The Sun-dial, unlike watches, show real solar time as time, invented by man, largely simplified. On the sundial is clearly possible to see noon. The period between noon is called the solar day. Sundial is directly dependent on the sun, and to construct a mechanical unit that focuses on light, is almost impossible. Time, invented by man is not only accurate, but also permanent, which eliminates the most accuracy.

Definition of time by the sun

Thus, the gnomon – this is one of the main parts of a sundial. In appearance it is a beautiful design. The observation of the gnomon allows to know the exact time depending on the sun, that is true.


Article in other languages:

AR: https://tostpost.com/ar/education/7526-the-gnomon-is-the-simplest-sundial.html

BE: https://tostpost.com/be/adukacyya/13462-gnomon---geta-nayprostyya-sonechnyya-gadz-ny.html

DE: https://tostpost.com/de/bildung/13466-gnomon---das-ist-die-einfachste-sonnenuhr.html

ES: https://tostpost.com/es/la-educaci-n/13473-el-gnomon-es-intestinales-en-el-reloj-de-sol.html

HI: https://tostpost.com/hi/education/7532-the-gnomon-is-the-simplest-sundial.html

JA: https://tostpost.com/ja/education/7529-gnomon.html

KK: https://tostpost.com/kk/b-l-m/13465-gnomon---b-l-arapayym-k-n-sa-aty.html

PL: https://tostpost.com/pl/edukacja/13452-gnomon---to-najprostsze-zegar-s-oneczny.html

PT: https://tostpost.com/pt/educa-o/13446-gnomon-um-simples-rel-gio-de-sol.html

TR: https://tostpost.com/tr/e-itim/13468-g-ne-saati-mili---bu-basit-bir-g-ne-saati.html

UK: https://tostpost.com/uk/osv-ta/13461-gnomon---ce-nayprost-sh-sonyachn-godini.html

ZH: https://tostpost.com/zh/education/8191-the-gnomon-is-the-simplest-sundial.html






Alin Trodden - author of the article, editor
"Hi, I'm Alin Trodden. I write texts, read books, and look for impressions. And I'm not bad at telling you about it. I am always happy to participate in interesting projects."

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