M. Kumar, B. Sahoo and S. Sahoo
In string theory, photon and electron are considered as different vibrational modes of strings. In this work, we assume that Raman effect, Photoelectric effect and Compton effect can be visualized in string theory. We find out the force of interaction between photon and electron by calculating the time interval between incident photon and scattered photon
in Raman effect and Compton effect as well as time interval between incidence of photon and emission of electron in photoelectric effect using Heisenberg’s Uncertainty Principle. Then we calculate the force of interaction between two strings whose vibrational modes are photon and electron in string theory. Finally, we calculate the coupling constants of the two interacting strings.