The methods learnt in the introductory courses in mechanics and waves are applied in this course to study naturally occurring wave phenomena. This course is meant to be an introduction to acoustics and optics, which has fundamental applications in fields as diverse as astronomy, medicine, communications and lighting. Acoustic and optical phenomena are ubiquitous in nature and those technologies pervade almost every sphere of human life. This course will also set the foundation for students interested in both postgraduate level courses in optics and in careers in optical science and engineering.