S. K. Singh is a former professor in the Department of Physics, Aligarh Muslim University, India. He was awarded his Ph.D. from Carnegie Mellon University, USA. He has been teaching courses on classical mechanics, relativity, classical electrodynamics, quantum mechanics, nuclear physics, particle physics, field theory and mathematical physics at undergraduate and graduate levels. He has been an Alexander von Humboldt Fellow, Germany; Senior Associate of ICTP, Trieste, Italy; and has been visiting professor at the University of Mainz, Germany and the University of Valencia, Spain. He has published more than 100 research papers in reputed journals and has contributed to the understanding of neutrino reactions from the nuclear targets, which is widely acclaimed.