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Calculate the wavelength (in nanometer) associated with a proton moving at `1.0 xx 10^(3) ms^(-1)`

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Calculate the wavelength (in nanometer) associated with a proton moving at `1.0 xx 10^(3) ms^(-1)`
A. 0.032 nm
B. 0.40 nm
C. 2.5 nm
D. 14.0 nm
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Correct Answer - B
`lamda = (h)/(mv) = (6.62 xx 10^(-34) kg m^(2) s^(-1))/((1.67 xx 10^(-27) kg) (10^(3) ms^(-1)))`
`= 3.96 xx 10^(-10) m = 0.40 nm`
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