The uncertainty principle is one of the basis principle of modern science. This principle rules out the existence of definite trajectroies but we continue to talk of paths of cars, balls, planets, etc., because

Options

A. these objects are visible to us
B. the effect of the uncertainty principle is important for the motion of microscopic objects
C. the effect of the uncertainty principle is negligible for macroscopic objects
D. the value of Planck's constant is very small

Answer

C

Explanation

When the mass of an object is relatively large, as is ture in daily life, then both `Deltax` and `Deltav` in Heisenberg's relationship are very small. We can, therefore, talk about the simultaneous position and velocity of such an object at any moment. the concept of trajectory makes sense in this case.