$A$ particle of mass $1 \, mg$ has the same wavelength as an electron moving with a velocity of $3 \times 10^6 \, m/s$. The velocity of the particle is (mass of electron $= 9.1 \times 10^{-31} \, kg$).

  • A
    $3 \times 10^{-31} \, m/s$
  • B
    $2.7 \times 10^{-21} \, m/s$
  • C
    $2.7 \times 10^{-18} \, m/s$
  • D
    $9 \times 10^{-2} \, m/s$

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