Physics for Everyone: From Atoms to the Cosmos

Physics — one of those sciences that has made the world around us what it is: cars and trains, rockets and space stations, television, the internet, electron microscopes, mobile communication, and other benefits of technological civilization. Physics has allowed us... to obtain answers to the most diverse questions. What is "noise pollution," why do some sounds destroy our bodies while others heal? Who will age faster: a person on Earth or an astronaut flying to another planet? Where does the ubiquitous radiation come from and how does it affect us? What colors need to be mixed to get white? What "ingredients" are needed to create the Universe: ordinary and dark matter, dark energy — what else? Physics not only invents the most interesting puzzles, but also provides accurate, well-founded answers to them. Don't believe it? Then try to calculate which is greater: the stars in the entire visible Universe, the grains of sand on all the beaches of the Earth, or the molecules in a glass of water? You will find the answers to these and many other questions in the pages of this book.