In the figure, a very large plane sheet of positive charge is shown. P_1 and P_2 are two points at distance l and 2 l from the charge distribution.…

In the figure, a very large plane sheet of positive charge is shown. $\displaystyle \mathrm{P}_1$ and $\displaystyle \mathrm{P}_2$ are two points at distance $\displaystyle l$ and $\displaystyle 2 l$ from the charge distribution. If $\displaystyle \sigma$ is the surface charge density, then the magnitude of electric fields $\displaystyle \mathrm{E}_1$ and $\displaystyle \mathrm{E}_2$ at $\displaystyle \mathrm{P}_1$ and $\displaystyle \mathrm{P}_2$ respectively are :