Not every paradox is equally paradoxical. There are various reasons why paradoxes in physics are treated as paradoxes: intuitively unacceptable theoretical assumptions or intuitively unacceptable experimental results. It was noted that the authors often used the term paradox in a non-compliant way. This book should help identify different types of paradoxes, which have not been distinguished in physics so far. The first hypothesis is: that classifying a paradox we can determine its structure. Classifications should help physicists to recognize paradoxes more accurately. The second hypothesis is: If in mathematics there is a possibility that there are statements that cannot be proved to be true or false, then in physics, a science that contains parts of mathematics, there is a possibility that paradoxes are indispensable factors of the explanation of physical events. ¿ Not all paradoxes are equally paradoxical. ¿ What people call paradoxes does not have the same structure. ...