Physics 11 PCTB

Physics 11 PCTB Physics 11 is published by Punjab Curriculum and Textbook Board (PCTB), Lahore, Pakistan. This book is the part of curricula of FSc Part 1 or HSSC 1 for various boards in Pakistan including BISE Bahawalpur, DG Khan, Faisalabad, Gujranwala, Lahore, Multan, Rawalpindi, Sahiwal, Sargodha and AJK Mirpur.

At the present time, there are three main frontiers of fundamental science. First, the world of the extremely large. The universe itself. Radio telescopes now gather information from the far side of the universe and have recently detected, as radio waves, the 'firelight' of the big bang which probably started off the expanding universe nearly twenty (20) billion years ago. Second, the world of the extremely small. that of the particles such as electrons, protons, neutrons, mesons and others. The third frontier is the world of complex matter. It is also the World of “middle-sized” things. from molecules at one extreme to the Earth at the other. This is all fundamental physics, which is the heart of science.

But what is physics? According to one definition, Physics deals with the study of matter and energy and the relationship between them. The study of physics involves investigating such things as the laws of motion, the structure of space and time, the nature and type of that hold different materials together, the interaction between different particles, the interaction of electromagnetic radiation with matter and so on.