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# The de - Broglie wavelength of a particle of mass 6.63 g moving with a velocity of $\;100\;ms^{-1}\;$ is :

$(a)\;10^{-33}\;m\qquad(b)\;10^{-35}\;m\qquad(c)\;10^{-31}\;m\qquad(d)\;10^{-25}\;m$

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