What is the de-Broglie wavelength of
(iii) a dust particle of mass `1.0xx10^(-9)` kg drifting with a speed of 2.2 m/s?

Explanation

Mass of a dust particle, `m=1xx10^(-9)` kg and
speed of the dust particle, v = 2.2 m/s
`lamda=h/(mv)`
`=(6.63xx10^(-34))/(1xx10^(-9)xx2.2)`
`=3.0xx10^(-25)` m