Quantum dots have interesting optical properties.They absorb incoming light of one color and emit out light of a completely different color.This research paper discloses eigen states of a simple and multilayer quantum dot in various structures for cuboid,cylinder,dome,cone,and pyramid,and its three-dimensional wave function,energy states,light and dark transitions(X-polarized),light and dark transitions(Y-polarized),light and dark transitions(Zpolarized),light and dark transitions(phi=0 and theta=45),absorption(phi=0 and theta=45),absorption sweep of angle theta,and integrated absorption are plotted and the observations of high peak values are noted and documented.