A particle of mass 1 mg has the same wavelength as an electron moving with a velocity of 3 $ \times $ 106 m s$-$1. The velocity of the particle is

Question

A particle of mass 1 mg has the same wavelength as an electron moving with a velocity of 3 $ \times $ 10⁶ m s^$-$1. The velocity of the particle is

3 $ \times $ 10^$-$31 ms^$-$1

$2.7 \times {10^{ - 21}}\,m{s^{ - 1}}$

2.7 $ \times $ 10^$-$18 ms^$-$1

9 $ \times $ 10^$-$2 ms^$-$1

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