Question

Write the expression for the de-Broglie wavelength of a particle.

Answer 1

The de-Broglie wavelength of a particle is an attribute associated to the particle's velocity. It is manifested in all the particles in quantum mechanics, according to wave-particle duality, and it determines the probability density of finding the object at a given point of the configuration space.

The de Broglie wavelength is inversely proportional to the particle momentum.

de-Broglie wavelength $\lambda =\frac{h}{p}$
where $h$ is the Planck's constant and $p$ is the linear momentum of the particle.