Kotcherlakota Rangadhama Rao  Prof. Kotcherlakota Rangadhama Rao (9 September 1898 – 20 June 1972) was an Indian physicist in the field of Spectroscopy. Rangadhama Rao is best known for his work on spectroscopy, his role in the development of Nuclear Quadrupole Resonance (NQR), and his long association with the physics laboratories of Andhra University. In his later years, he became known for his position as the Principal of all the colleges of Andhra University before their divisions into separate colleges, viz., AU College of Arts and Commerce, AU College of Engineering, AU College of Law, AU College of Pharmacy and AU College of Science and Technology. Rangadhama Rao was known both for his scientific ability and his interpersonal relations and volatile personality  Kotcherlakota Rangadhama Rao was born in Vizianagaram, a coastal town in present-day Vizianagaram district of state of Andhra Pradesh, India, on 9 September 1898. His father, Kotcherlakota Venkata Narsing Rao was the postmaster of the present-day cities of Vizianagaram, Gajapathinagaram and Visakhapatnam, then small cities in the state of Andhra Pradesh in the Madras Presidency of British India. His mother, Ramayamma, died in 1923. Kotcherlakota Rangadhama Rao had an arranged marriage to Vaddadi Perramma, as was the custom in the region. On 6 December 1925, when Rangadhama Rao was 27, the couple's first child, Ramakrishna Rao, was born. Rangadhama Rao and Vaddadi Perramma had seven more children, four sons and three daughters: Venkata Rao (5 February 1928); Venkata Narsing Rao (27 June 1933); Ramaleela (24 April 1938); Lakshmi Narayana (23 July 1940); Lalitha Kumari (31 July 1941); Amarnath (8 June 1944); and Vijaya Vani (19 December 1945). His elementary education was at Maharaja's High School, Vizianagaram for the 3rd, 4th and 5th grades during 1904 and 1906. He joined in different schools each year in his early education. He was shifted to London Mission High School, Vizianagaram, for the 6th grade and studied 7th and 8th grades in Hindu High School at Machilipatnam.