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Calculate the wavelength (in nanometer) associated with a proton moving $1.0\times 10^3ms^{-1}$ (mass of proton=$1.67\times 10^{-27}$kg and $h=6.63\times 10^{-34}Js)$


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$\lambda=\large\frac{h}{mu}=\large\frac{6.63\times 106{-34}}{1.67\times 10^{-27}\times 1.0\times 10^3}$
$\Rightarrow 0.397\times 10^{-9}m$
$\Rightarrow \approx 0.40\times nm$
Hence (b) is the correct answer.
answered Jan 13, 2014 by sreemathi.v

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