Question

The de broglie wavelength of an electron with a velocity of 7.40 × 106 m/s is ________ m. the mass of the electron is 9.11 × 10-28 g.

Answer 1

The de Broglie wavelength has an equation written as:

λ = h/mv
where
λ is the de Broglie wavelength
h is the Planck's constant equal to 6.63×10⁻³⁴ J·s
m is the mass
v is the velocity

Substituting the values (make sure to use SI units):

λ = (6.63×10⁻³⁴ J·s)/(9.11×10⁻²⁸ g * 1 kg/1000 g)(7.40×10⁶ m/s)
λ = 9.835×10⁻¹¹ m