Field lines are a conceptual tool used to visualize the electric field surrounding a charged object. They show the direction and strength of the electric field at various points in space.
Field lines are created by electric charges. They originate from positive charges and terminate at negative charges. The density of field lines is proportional to the magnitude of the charge.
When a charge is immersed in two dielectrics, the field lines will bend and change direction at the interface between the two materials. The amount of bending depends on the dielectric constants of the materials.
Field lines can help us understand how electric charges behave in dielectrics by showing the path that a charge would take as it moves through the material. They also help us visualize how the electric field changes in different regions of the material.
No, field lines cannot be used to directly calculate the electric field in a dielectric. They are a qualitative tool used for visualization and understanding of the electric field. To calculate the electric field in a dielectric, we must use mathematical equations and the properties of the material such as the dielectric constant.