If the kinetic energy of an electron is 100 eV, ...
If the kinetic energy of an electron is 100 eV, what is the wavelength of the de-Broglie wave associated with it? [h = 6.6 x 10−34 J s, e = 1.6 x 1019C, me, = 9.1 x 10−31 kg]
1.22 x 10−10m
4.10 x 10−10m
3.90 x 10−10m
5.50 x 10−14m
Correct answer is D
de broglie wavelength formula in terms of kinetic energy:
λ = h√2mE
λ = 6.6∗10−34√2∗9.1∗10−31∗100
λ = 5.50 x 10−14m