Swami Jnanananda born as Bhupathiraju Lakshminarasimha Raju (5 December 1896 – 21 September 1969) was an Indian Yogi and Nuclear Physicist.
Swami Jnanananda was married by his father in 1916 but, inspired by the life of Gouthama Buddha, he renounced worldly pleasures and went to Lumbini, in Nepal.
His research at the university led to the development of precise methods in X-Ray spectroscopy for which he was awarded a D.Sc.
He has shifted to England and joined University of Liverpool under Sir James Chadwick during the World War II.
He continued his research on Beta Ray spectroscopy in the United States with a number of radioactive isotopes at the Michigan University.
He returned to India in 1947 and joined as senior scientific officer at the National Physical Laboratory in Delhi.