calculate the kinetic energy of an alpha- particle which has a wavelength of 12pm.
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Answer:
Debroglies wavelength λ=
2ME
h
,given λ=12pm
mass of α particle
=mass ofHe
=4amu
=4×1.66×10^−27
E=h²÷ 2mλ²
=(6.626×10
−34² )÷2×4×1.66×10^-27×12×10^-12
=1.722×10^−11ev
kinetic energy of α particle =1.722×10^−11ev
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