1.

Calculate the de Broglie wavelength of a neutron of kinetic energy 150 eV. mass of neutron = 1.67 × 10–27 kg.

Answer»

De Broglie wavelength λ = h/√2mEk

Here EK = 150 eV = 150 × 1.6 × 10–19 J = 2.4 × 10–17 J

∴ λ = 6.63 x 10-34/√[2 x 1.67 x 10-27 x 2.4 x 10-17] m= 2.335 x 10-12 m

= 0.02335 Å



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