I was solving some problem regarding the polarization during this I came across an example 4.5 in Griffith's where it is written that the Electric field inside the metal sphere carrying a charge Q is zero . The metal sphere is surrounded by a dielectric material
Is there any effect of the material which has surrounded the metal sphere due to which it's electric field inside the sphere becomes zero.
Can anyone explain me about these things? I literally confuse among the situations that where the electric field should be zero or not.