Question

An electron is associated with a wave length of 10nm. Calculate the velocity of the electron.​

Answer 1

lambda = h/mv

mass of an electron = 9.1 × 10^-31 kg

planck's constant = 6.62 × 10^-34 kg/s

wavelength = 10 × 10^-9 m

v = h/mw

v = 6.62 × 10^-34 / 9.1 × 10^-31 × 10 × 10^-9

solve this.