Master the fundamental principles of semiconductor physics with this essential guide for Indian students. Delve into solid-state physics, P-N junctions, and the operational physics of key semiconductor devices like LEDs, bipolar and field-effect transistors, and semiconductor lasers. The book simplifies complex concepts, requiring only essential physical understanding, making it perfect for engineering and physics undergraduates across India. It includes helpful worked problems to reinforce learning. An accessible introduction to quantum theory concludes this comprehensive exploration of semiconductor device operation, ideal for academic success.