Why does the electric field due to an infinite charged sheet remain constant regardless of its thickness?
**Electric field concept** visualizes influence of source charge. Uniform field exerts constant force F = qE, and flux Φ = E·A = E A cosθ links field to area orientation, maximum when field normal to surface. For an infinite sheet, Gauss’s law shows the field depends only on the surface charge density ( sigma/2ε₀ ). Thickness doesn’t affect the planar symmetry or enclosed charge per unit area, keeping the field constant. Substituting values gives Surface charge density, which matches expected magnitude for this electrostatic configuration, confirming Coulomb's and Gauss's principles and charge quantization consistency.
Ref: NCERT > Physics Book > Electric Charges and Fields > Electric Field and Electric Field Lines