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An electron of mass 9.1 x 10-31 kg moves with a s...

An electron of mass 9.1 x 10-31 kg moves with a speed of 107ms-1. Calculate the wavelength of the associates wave[h = 6.6 x 10-34Js]

A.

9.0 x 10-24m

B.

4.55 x 10-17m

C.

7.25 x 10-11m

D.

6.20 x 10-8m

Correct answer is C

λ=hc12mv2

= 6.6x1034×3×1080.5×9.1×103(107)2

= 7.25 x 10-11m