Correct Answer: Option C

Explanation

\(\lambda = \frac{hc}{\frac{1}{2}mv^2}\)

= \(\frac{6.6 x 10^{-34} \times 3 \times 10^8}{0.5 \times 9.1 \times 10^{-3} (10^7)^2}\)

= 7.25 x 10^-11m

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