Answer
5.39 nm
Work Step by Step
λ = $\frac{h}{mv}$
h = $6.626\times10^{-34}Js$
m = $9.109\times10^{-31}kg$
v = $1.35\times10^{5}ms^{-1}$
λ = $\frac{6.626\times10^{-34}Js}{9.109\times10^{-31}kg\times1.35\times10^{5}ms^{-1}}$ = $5.39\times10^{-9}m$ = 5.39 nm
