String theory and Quantum gravity
String Theory is a hypothetical system in which the point-like particles of molecule material science are supplanted by one-dimensional things called strings. It describes how these strings propagate through space and interact with each other. On distance scales larger than the string scale, a string looks just like an ordinary particle, with its mass, charge, and other properties determined by the vibrational state of the string. Thus, string theory is a theory of quantum gravity. Quantum Gravity (QG) is fields of hypothetical material science that looks to depict gravity as per the standards of quantum mechanics, and where quantum impacts can't be overlooked, for example, close conservative astrophysical items where the impacts of gravity are solid. In string theory, one of the numerous vibrational conditions of the string related to the graviton, a quantum mechanical molecule that conveys gravitational power.