Question

When can the magnitude of the electron’s momentum be written as \[mv_n\]?

Options

• When the electron’s speed equals the speed of light

• When the electron’s speed is much less than the speed of light

• When the electron’s amplitude quickly falls to zero

• When the electron moves in a two-electron atom

Answer 1

If the electron’s speed is much less than the speed of light, its momentum magnitude is \[mv_n\]. This permits the de Broglie wavelength to be written using its mass and speed.