There are many myths about radiation and nuclear energy. This book aims at dispelling the myths and giving a real picture to high school students, with basic knowledge in science. It introduces the students to the concept of energy, bringing out various sources for electricity generation and brininging out in brief detail the types of nuclear reactors and how it is a clean energy with minimal effect on the environment and climate change. The book brings out varios application of radiation in medicine, agriculture, food preservation and industry. Career opportunities in the nuclear arena are briefly brought out.