International Liquid Mirror Telescope
Liquid Mirror Telescope, Uttarakhand is a 4 meters telescope in Uttarakhand which is the first liquid mirror telescope for astronomy in the world and largest liquid mirror telescope in Asia. History
In 2 June 2022, the telescope saw first light coming from universe. In 12 June 2022, it came online. In 21 June 2022, it became ready to observe. In 21 March 2023, it was inaugurated by Jitendra Singh. Mechanism 
The telescope uses mercury element to employ as a reflective and mirror surface. The element is rotated along with the axis of telescope and this rotation makes rotational force which makes the light to focus on it by which the telescope can see light coming from the universe. References 

Telescopes
Optical telescopes
Astronomical observatories in India
Liquid mirror telescopes