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,
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,