The reason why we are able to enjoy the comfort of modern technology in our homes, is our understanding of several complicated concepts of physics. TV, personal computer, automatic doors, electron microscope, GPS, MRI scan and other such technological applications make our lives better. In the early 20th century, a number of important discoveries and theories were put forward - discovery of electron and internal structure of atom, Einstein's relativity and quantum theory to name a few. Most ideas were beyond human comprehension, some of the theories were bizarre In this book we will try to understand the basics of modern physics in a way that anyone can appreciate the relevance of modern technology