Hybridization is the process of intermixing of orbitals of slight different energies so as to redistribute there energies so as to form new orbitals of equivalent energy and shape. In sp3 hybridization it involves the mixing of one s orbital and three p orbitals of equal energy to give a new hybrid orbital known as sp3. A mixture of s and p orbitals formed is in tetrahedral symmetry and is maintained at an angl of 109o28′′.E.g CH4.