The wavelength of light from the spectral emission line of sodium is 589 nm. Find the kinetic energy at which
(a) an electron, and
(b) a neutron, would have the same de-Broglie wavelength.
Given,
Wavelength of sodium light, = 589 nm
We know that,
(a) For electron,
Energy,
(b) For neutron,
Energy,
What is the de-Broglie wavelength of
(a) a bullet of mass 0.040 kg travelling at the speed of 1.0 km/s.
(b) a ball of mass 0.060 kg moving at a speed of 1.0 m/s and
(c) a dust particle of mass 1.0 x 10–9 kg drifting with a speed of 2.2 m/s?
(a) Given,
De-broglie wavelength is,
(b) Mass of the ball,
Velocity with which the ball is moving,
Momentum of the particle,
Therefore,
De-broglie wavelength of the particle,
(c) Mass of the dust particle,