wavelength = h/mv
m is in kg
v in m/s
wavelength in meters.
An electron moves with a velocity of 2.5 x 10^8 cm/s. What is its wavelength? (The mass of an electron is 9.109 x 10^-28 g.)
2 answers
w = (6.626x10^-34 J*s)/[(9.109x10^-31 kg)(2.5x10^8 m/s)] = 2.91x10^-12 m
1 answer