Given:
Wavelength of neutron = 1.40 A
To determine:
the velocity of neutron
Explanation:
The relation between wavelength λ and velocity v can be expressed through the de Broglie relation:
λ = h/mv
where h = planck's constant 6.626*10⁻³⁴ Kg.ms-2
m = mass of neutron = 1.6749*10⁻²⁷ kg
v = h/mλ = 6.626*10⁻³⁴/1.6749*10⁻²⁷*1.40*10⁻¹⁰ = 2.83*10³ m/s
Ans : velocity v = 2.83*10³ m/s
