The value of de-Broglie wavelength associated with a moving particle is given by
\(\lambda = \frac{h}{mv}\)
Consider a particle of mass 1 kg moving with velocity v = 1ms-1, then wavelength of de-Broglie wave associated with the particle will be
λ = \(\frac{6.62 \times 10^{-34}}{1 \times 1}\)
= 6.62 x 10-34 m
This value of λ is of the order of 10-34 m and is very small as compared to the size of the particle of 1 kg would possess and hence λ cannot be detected by any instrument. So wave nature of matter is not apparent in our daily observations.