Photographed during the opening function of the exhibition (23 December 2015 to 17 January 2016) titled 'Light Matters' on the occasion of the ‘International Year of Light and Light-based Technologies, 2015’ (IYL 2015), an United Nations observance on Wednesday, 23rd December 2015, that was opened by Professor Santanu Bhattacharya, Director, Indian Association for the Cultivation of Science (IACS) at the Birla Industrial & Technological Museum (BITM), Kolkata. It was developed by the National Council of Science Museum (NCSM) under the Ministry of Culture, Govt. of India. About one hundred general people with students, teachers, and distinguished guests were present at the function.