Apr 3, 2017

de Broglie wavelength $\lambda = \frac{h}{p}$
where $h$ is Planck's constant $= 6.626 \times {10}^{-} 34 \text{ J"cdot"s}$, and
$p$ is the momentum of the object.
It may be seen that objects with large mass or having large velocity, $\lambda$ is very very small.