Calculate the de Broglie wavelength of a proton moving at 3.10 ✕ 104 m/s and 2.07 ✕ 108 m/s.
(a) 3.10 ✕ 104 m/s
......... m
(b) 2.07 ✕ 108 m/s
........ m
Solution)
Part a)
De Broglie wavelength,
λ = h/(mv)
= 6.63*10^-34 / (1.672*10^-27 * 3.1*10^4)
=1.279*10^-11 m
===============
Part b)
Lambda =6.63*10^-34 / (1.672E-27 * 2.07E8)
=1.97*10^-15 m
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