In: Physics
Q/ If E is a macroscopic field inside the dielectric , and consider an atom at position R , Draw a sphere of radius ℓ ( Lorentz sphere) about R. suppose( l » a interatomic spacing ). The contribution to the microscope field at R from induced dipoles on other atoms can be divided in two parts ;
For the two cases prove that the local field at center of sphere is :
ELF = E0 – 4/3 πP + 4/3 πP + 0