The theoretical part of the thesis is divided into two parts and it describes the refraction as a physical phenomenon. The first part represents the basic characteristics of the light as an electromagnetic wave acoording to the law of refraction. The second part presents the refraction as a measurement error, which shows up in geodetical measurements.
The practical part presents the reading of the horizontal refraction, based on the field measurement. Our goal was to describe the influence under different circumstances, such as: the temperature, the distance of line of sight from the object, the distance of the object from the instrument, and the length of line of sight. The object of our measurement was an automobile. With the help of the equations presents in foreign literature, our next step was to calculate the angle of refraction and its influence on the measurements.