The book consists of nine conversations covering a wide range of issues related to the refraction of light. Having met her, the reader will be convinced how much amazing, instructive, useful for practice can be in the seemingly familiar phenomenon of light refraction. It made it possible to explain such "riddles" of nature as mirages, rainbows, halos, false suns and others; it also helped a person to "tame" the light beam in order to use it for practical purposes. Popular and exciting, the authors talk about prism and lens optical systems, about crystal optics, about fiber optics, which, figuratively speaking, allows you to arbitrarily bend the light beam, and much more.