We have measured X-ray,optical and microwave radiations from two parallel wires driven by a current rising to220 kA in 100 ns.The experimental results imply that they are generated by different radiation mechanism.X-ray is generated by thermal radiation which is proportional to ohmic heating of wires.Optical radiation is from thermal emission and line emission,but microwave radiation is produced by non-thermal radiation.The dependence of radiation on distance between two wires demonstrates that increasing t...