a. The wave nature of matter is not noticeable in our daily observations. Justify your answer.

Explanation

a. For a very small dust particle of radius `10^(-6)m(1mu m)`, density `rho=10^(4)kg//m^(3)` moving with a velocity of 0.01 m/s, its momentum p is
`p=mv=(4)/(3)pi r^(3) rhov=(4)/(3)pi xx (10^(-6))^(3)xx10^(4)xx0.01`
`p ~~ 4xx10^(-16)"kg m"//s`
de Broglie wavelength associated with this particle is
`lambda=(h)/(p)=(6.625xx10^(-34))/(4xx10^(-16))~~1.6xx10^(-18)m`
This value of `lambda` is extremely small compared to the dimension of any physical system.