Calculate the wavelength (in nanometer) associated with a proton moving at `1.0xx10^(3) ms^(-1)s` (mass of proton `= 1.67 xx 10^(-27) kg and h = 6.63 xx 10^(-34) Js)`

Options

A. 0.032 nm
B. 0.40 nm.
C. 2.5 nm
D. 14.0 nm

Answer

B

Explanation

Using de Broglie relationship `lamda =(h)/(mv) =(6.63xx10^(-34))/(1.67xx10^(-27)xx10^(3))=3.97xx10^(-10) m=0.40 nm`