A grain of sand of mass 1 mg is blown by wind at a speed of 20 m/s. what is the de broglie wavelength associated with the grain ? `[h=6.6xx10^(-34) Js]`

Options

A. `3.3xx10^(-33) m`
B. `3.3xx10^(-32) m`
C. `3.3xx10^(-35) m`
D. `3.3xx10^(-36) m`

Answer

B

Explanation

`lamda = (h)/(mv) = (6.6xx10^(-34))/(1xx10^(-3)xx20) = (6.6xx10^(-34))/(2xx10^(-2))`
`=3.3xx10^(-32) m`