After considering the interaction between electrons, the problem of a semiconductor interacting with light is discussed and the equation of exciton polarization wave excited by light wave is obtained.

The effect of laser incidence angle on the angular distribution of hot electrons generated in the interaction of an ultrashort intense laser pulse with the foil target are investigated.

There exists great importance in the investigation both into the fundamental physics related to the beam-wave interaction and into the rule of electrons movement in this device.