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Calculate the de Broglie wavelength of a...

Calculate the de Broglie wavelength of a neutron of kinetic energy 150eV. Mass of neutron `=1 .67 xx 10^(-27) kg`.

Text Solution

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de Broglie wavelength `lambda = ( h)/( sqrt( 2mE_(k))`
Here `E _(K) = 150 eV = 150 xx 1.6 xx 10^(-19) J`
`= 2.4 xx 10^(-17)J`
`:. lambda = ( 6.63 xx 10^(-34))/( sqrt([2 xx 1.67 xx 10^(-27) xx 2.4 xx 10^(-17)]))`
`= 0.02335 Å`
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