Electrostatic Screening and Electrostatic Energy

We discuss electrostatic screening effect by applying the classic electromagnetism theory combined with energy band theory,considering electrostatic screening effect as electrostatic field screening effect,instead of the electrostatic potential,i.e.electrostatic energy,screening effect.we calculate the electrostatic energy of conductor in the state of electrostatic balance,and analyze the way of calculating,discuss the difference between and the meaning of electrostatic energy and electrostatic field energy,and measure the thickness of charged sheet and to discuss the meaning of the sheet′s thickness by calculating the electrostatic energy and electrostatic field energy of conductor sphere in the state of electrostatic balance.