This compendium is earmarked for young inquisitive mind trying to comprehend and understand the different manifestations in the world around us from a scientific view point. The coverage in the book is a virtual rainbow covering the many shades of physics principles operating in nature, from the microcosm to macrocosm, the world of sub-atomic particles, the interactions of light and matter, the underlying forces in nature, our own environment, the Sun and the solar system and the universe at large, painted by people who are some of the renowned experts in their subject domain. Successful indigenous efforts towards development of novel techniques, outlined in the volume, should be an eye opener for those who would like to take up challenging tasks. Likewise, our lack of precise understanding of phenomena that we encounter routinely demonstrates how little we know the nature around us. We have a long way to go before we can comprehend nature in all its beauty and complexities. This volume is intended to kindle enthusiasm amongst young people who are fascinated by nature and would like to understand the underlying scientific principles that govern all that we see, feel and experience around us.Happy reading!