This principle states that it is not possible to measure the exact position and the exact velocity at the same time for an object. This is so because when measuring the velocity, the nature of the object is affected which makes the accurate measurement of its position not possible and vice versa.
Diagrams
Originated from/Coined by
Werner Heisenberg
Further Reading/ References
https://www.britannica.com/science/uncertainty-principle
https://en.wikipedia.org/wiki/Uncertainty_principle
http://abyss.uoregon.edu/~js/21st_century_science/lectures/lec14.html