Казанцева Алла Borisovna is a candidate of физико-математических sciences, associate professor of department of general and experimental physics of МПГУ, финалист of competition of WOUNDS 2019 for the best works on popularization of science.Physics - one of those sciences, that allowed to do the world round us such, what he is: machines and trains, rockets and space stations, television, internet, electronic microscope, mobile communication and other blessing technical civilizations.Physics allowed to get answers us for the most various questions. What "noise contamination", why do one sounds destroy our organism, and other - treat? Who will become old quicker: man on Earth or cosmonaut flying to other planet? Where does an ubiquitous radiation undertake from and as she us affects? What colors do need to be mixed up, to get white? What "ingredients" need for creation to Universe: ordinary and dark matter, dark energy - that yet?Physics not only thinks of interesting riddles but also gives exact, reasonable answers on them. Do you disbelieve? Then try to count up, what anymore: stars in all visible Universe, grains of sand on all beaches of Earth or molecules in glass of water? An answer for these and many other questions you will find on the pages of this book.