According to modern theory of atomic model how orbitals can be viewed, drive equation
and give significant values of electron wave function.
According to modern theory of atomic model orbitals are layers, shells, and energy levels.
According to the De Broglie hypothesis, the wave-particle duality (dual nature) of an electron is proved by the presence of both the properties of a particle (corpuscle) having a certain mass m and velocity u, and the properties of a wave with a certain wavelength λ and oscillation frequency v.
for an electron with mass m and velocity y, the wavelength, which is commonly called the De Broglie wave, is:
"\u03bb = hm\u03c5"