The De Broglie wavelength of 1 mg grain of sand blown by a wind at the speed of m/s is .... (h = 6.63 × 10-34 S.I. unit) (а) 33.15 х 10 36 m (b) 33.15 x 10-33 m (c) 33.15 × 10-30 m (d) 33.15 × 1030 m
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