(a) The whole structure is made up of stone and marble with
each of them having engraved astronomical scale. It consists of fourteen geometric
devices, used for measuring time, forecasting weather changes, predicting behaviour of planets
and finding extraterrestrial altitudes which attracts architects, historians and scientists
from all over the world.
(b) Iantar Mantar was built by Maharaja Sawai Jai Singh-II
of Jaipur in 1710 AD. Jantar Mantar finally got the status of a national monument in
1948.
(c) Maharaja Jai Singh was a fanatical astronomer who felt
that the tables used by pundits were deceptive and the actual planetary changes and
predictions of eclipses would not be possible through these measuring parameters. He wanted an
improved and efficient means through which exact predictions could be made. So, he
gave shape to such an instrument.
(d) Iantar Mantar consists of 14 geometric devices which are
fixed and point to a specific direction. The largest device or instrument is the ’Samrat
Iantar’ which is 90 feet high and its shadow is plotted in such a manner that it shows the
exact time of the day.
(e) (i) ancient
(ii) devices
(iii) perception
(iv) astronomical
(Hope this helps)