Physics for Everyone: From Atom to Cosmos

Physics is 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 technical civilization. Physics has allowed us to find answers to a wide variety of questions. What is "noise pollution" and why do some sounds harm our bodies while others heal? Who ages faster: a person on Earth or an astronaut traveling to another planet? Where does the omnipresent 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 creates the most interesting puzzles but also provides accurate, well-founded answers to them. Don't believe it? Then try to calculate which is more: 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 answer to these and many other questions on the pages of this book.