Excerpt from my textbook
It is impossible to determine simultaneously, the exact position and exact momentum (or velocity) of an electron.
It rules out the existence of definite trajectories of electrons and other similar particles.
Ok, so we cannot know the exact position and velocity of an electron at any instant. But how does this conclude that electrons don't follow definite paths.
Isn't the fact that we need light to reflect off something in order to see it, merely a limitation on our part, a limitation of human eye?
To observe an electron, we need to illuminate it with "light" or electromagnetic radiation. The "light" used must have a wavelength smaller than the dimensions of an electron. The high momentum photons of such light would change the energy of electrons by collisions. We would be able to calculate the position of the electron but we would know very little about its velocity after collision.
This might seem like a silly question, in fact I don't know much about Quantum mechanics. My textbook goes over these topics vaguely.
It would be helpful if the answer would be in simple words and not in terms of mathematical equations.