Uploaded by franckbyron on Dec 30, 2011
UNESCO inscribed Jantar Mantar Jaipur in the list of World Heritage in July 2010. No need to say that Jaipur tour has no means without visiting this wonderful World Heritage Jantar Mantar Jaipur.
Small sun dial is known as "Laghu Samrat Yantra" in Hindi. When we enter the observatory, it is the first instrument to be observed. It is made of red sandstone and marble. It is in triangular shape. Its hypotenuse is inclined at an angle of 27 degree, which is equivalent to the latitude of Jaipur. It is calibrated in the scale of tangent so as to measure the declination of celestial bodies.
It has two quadrants on either side inclined in the plane of celestial equator by 23 degrees and divided by 6 hours. Each hour is divided in 60 minutes and each minute by three fractions so that the precision of the time observed is 20 seconds
The shadow of the gnomon falls on the quadrants and by observing it; we can read the local time. The difference between the Jaipur time and Indian Standard time varies from 10 minutes 25 seconds to 41 minutes 6 seconds. For ascertaining the declination of sun, we can place a pointer on the gnomon. The shadow of the gnomon already falls on the quadrants and when the shadow of the pointer intersects that shadow, the point on which the pointer is kept is the declination of the sun.
During night, this instrument is used for observing the declination of stars.
more info
http://www.jaipurthepinkcity.com/forts_monuments/jantar_mantar/jantar_mantar_...
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