Research on bees to develop drone technology Prime Minister Narendra Modi and many senior leaders extended greetings to all the "science lovers" on the occasion of National Science Day on Friday. On this day, Sir CV Raman had announced the discovery of the "Raman Effect" for which he was awarded the Nobel Prize in 1930. The theme for National Science Day 2020 is "Women in Science", which aims to celebrate the contribution of women in the field of science. In picture: Nobel Laureate CV Raman.Twitter/Doordarshan News Leaders greet nation Senior leaders, including PM Modi as well as social media users tweeted on the occasion.