Based on the qualitative analysis about the uncertainty relation,the paper went deep into the Heisenberg uncertainty relation step by step.At the same time,the paper pointed out the root cause leading to the uncertainty relation.At last,the uncertainty relation was deduced by the infinite deep well in one dimension.
The Heisenberg uncertainty principle is one of the foundations of quantum mechanics,although meaning of this principle is disputed in the region of physics.The teaching of this principle should help students to discard the conventional conception of orbit and estab lish the idea of wave-particle duality.However,the conventional conception of orbit is still used in many domestic textbooks of university physics.The stude nts tend to be confused consequently.Therefore,tens of textbooks of university physics are investigated and different accounts about uncertainty principle are compared,and then advice of teaching on this principle is brought forward.