The Asian Physics Olympiad (APhO) is a unique, single-subject, practical and theory-based individual competition in the field of physics. It was developed to provide young Asian students with a platform to display their physics knowledge. It is the celebration of the best in pre-university physics.Each year, for about one week, pre-university students from across Asia gather and test their theory and practical skills in physics. This book contains question papers in both theory and experiment and their solutions together with description of various activities of the 15th Asian Physics Olympiad held in Singapore from 11th to 18th May 2014. The book will serve as a valuable source of interesting and challenging experimental and theoretical topics for young physicists worldwide.