CSIR-Central Scientific Instruments Organisation celebrated "National Science Day" on February 28, 2018... by holding an Open Day and organizing National Science Day Lecture. All the labs of CSIR-CSIO were kept open for general public in the forenoon. Around 1000 visitors including students from various schools, colleges, universities and general public went around the laboratories of the institute. They interacted with the scientists and were given exposure to the technologies available & being pursued at CSIR-CSIO. Later in the afternoon Prof. Ajoy Ghatak, Professor Meghnad Saha Fellow of NASI (The National Academy of Sciences, India) delivered a lecture on the topic "Raman Effect & A Brief History of Development of Science in India". In this talk discussion was based on the basic physics of Raman Effect and also on history of development of science in India. Prior to this Prof. R. K. Sinha, Director, CSIR-CSIO welcomed the chief guest and said that National Science Day is celebrated in India on February 28 every year to mark the discovery of Raman Effect by C.V. Raman, for which he was awarded the Nobel Prize.