PHYSICS WITH POLARIZED PHOTONS AT SPRING-8

We discuss physics opportunities at SPring-8 using GeV-photons and MeV -photons obtained by Compton backscattering of laser photons from 8 Ge V electrons. We show a principle of Compton backscattering and an over view of applying a high energy photon beam for physics experiments. A new facility at SPring-8 is under construction, aiming at physics expe riments using a polarized photon beam in the energy range of 1.5 simil ar to 3.5 GeV. The main subject is to study sub-nucleonic degree of fr eedom through the measurements of various produced mesons. In addition , we present a possibility of nuclear resonance fluorescence (NRF) exp eriments with high intensity polarized photons at several MeV energies with an intensity of 10(8) similar to 10(9) per second.