The architecture of the Hindus , especially the Temples, is awe inspiring

THE Thanjavur Temple built in a region where there is no mountain nearby was built with stones;the top of the Temple tower has 80 tons of monolithic round stone; how people transported these huge stones and other materials over long distances when the swiftest mode of transport was,we presume were only bullock carts and horse driven carriages; it was built with calculations of Trigonometry so that the shadow of the Temple falls only on its base.
Or The Sun temple at Konark.
Or the world,s longest Corridor in Rameswaram Temple.
Or varius temples where the temples’ sanctum is so constructed that the rays of the Sun falls on the Deity at a particular time at a particular season.
At lease , in the last case you have an open area for the Light to fall on the Deity in the Sanctum.
But there is a temple where the shadow of pillars fall on Shiva Linga throughout the day and the Sanctum is closed on three sides while one through which one views the Deity is small where there is very little provision for Light to break in as the Sanctum is inside a Hall called Artha Mandapa.

This the Chaya Soma Lingeswara Temple in Telengana, India.
‘ Chaya Someswara Swamy temple, also known by the name Thrikutalayam, is a Hindu temple located in Panagal, Nalgonda district, Telangana, India

.It is a popular site during Sivarathri….

The temple was built in 11th – 12th centuries during by a Chola King of Ikshvaku Dynasty.

The formation of relentless shadow of a pillar falls over the main deity of Shivalingam throughout the day.

The local people thinks that the “chaya” is the shadow of one of the pillars constructed in front of it. They often stand beside the pillars to see their shadow inside the chamber. But it is not possible as the “chaya” is not the shadow of any pillar. They can only see a blurred shadow instead. If you want to see your shadow, you need to stand at the entrance (door sill) of the chamber.

The eleventh century architect might be aware of light diffraction and he constructed the temple in such a way that the light enters the inner chamber diffracting through two narrow passages on either side of the pillars in front of the chamber. The diffracted light enters the chamber making shadow of edges of entrance crisscrossing one with another leaving a gap between them. It may be noted here that Italian scientist Francesco Maria Grimaldi coined the word “diffraction” and was the first to record accurate observations of the phenomenon in 1660.

How to reach.

At a distance of 1.4 km from Panagal Bus Station, 4 km from Nalgonda Bus Station and 104 km from Hyderabad, Chaya Someswara Temple is a wonderful temple located at Panagal in Nalgonda district of Telangana. This is an interesting pilgrimage and historical site to visit from Nalgonda & Hyderabad.

Image credit. https://satyasairamkrishna9.wordpress.com/category/articles/
Citation and reference.