Heisenberg's uncertainty principle- It states that the position and momentum of microscopic moving particles cannot be determined simultaneously with accuracy or certainty.Mathematical expression-\\\\(\\Delta x \ imes \\Delta P > or = \\dfrac {h}{4\\pi}\\\\)\\\\(\\Delta x =\\\\) uncertainty in the position\\\\(\\Delta P = \\\\) uncertainty in the momentum \\\\(h\\\\)= Planck's constant.