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Q)

What is the de Broglie wavelength of a dust particle of mass $1 \times 10^{-9}$ kg drifting with a speed of $\;2.2 m/s$

$\begin {array} {1 1} (a)\;0.3 \times 10^{-25}m & \quad (b)\;3 \times 10^{-28}m \\ (c)\;3 \times 10^{-25}m & \quad (d)\;30 \times 10^{-25}m \end {array}$

 

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