Задача 31565.

An infinite plane is negatively charged with an areal density of 35.4 nKl / m ^ 2. At the direction of the field lines created by a plane flying electron. Determine the minimum distance at which the electron can approach the plane, if at a distance of 5 cm, he had a kinetic energy of 80 eV.

Detailed solution with a short recording conditions, laws and formulas used in the decision, the withdrawal of the calculation formula and the answer.
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