Question

calculate the kinetic energy of a moving electron which has wavelength of 4.8pm​

Answer 1

Answer:

Relationship between wavelength (λ) and momentum (p) is

λ=hp

p=hλ=6.63×10−34J s4.8×10−12m=1.38×10−22kg m/s

Now, find kinetic energy by relation K.E=p22m

K.E=p22m=(1.38×10−22kg m/s)22×9.1×10−31kg=1.05×10−14Joule

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