jacobrhcp said:no, consider a charge in a cavity in a conductor.
it's only in the meat of the conductor, because when you would put a conductor in a field, the electrons would move and create a field with the protons on their own. The two fields tend to cancel. But in a hole, you don't have this problem. (The edges of the conductor will be charged however, in that case.)
An electric field in an empty cavity refers to the electric field present inside a cavity or hollow space that is completely devoid of any material objects. This is usually studied in the context of electromagnetic theory and can be calculated using Maxwell's equations.
An electric field in an empty cavity differs from a regular electric field in the sense that it exists in a space with no material objects. In a regular electric field, the field lines are influenced by the presence of charges and materials, whereas in an empty cavity, the field lines are solely determined by the boundary conditions of the cavity.
The strength of an electric field in an empty cavity is affected by several factors, including the size and shape of the cavity, the boundary conditions of the cavity, and the distribution of charges outside the cavity. These factors determine the direction and magnitude of the electric field inside the cavity.
Yes, an electric field can exist in an empty cavity even when there are no charges present. This is because the boundary conditions of the cavity can create an electric field, which is independent of the presence of charges. However, the strength and direction of the electric field will be affected by the distribution of charges outside the cavity.
The electric field in an empty cavity has various practical applications, including in the design of microwave cavities for communication systems, in the study of quantum electrodynamics, and in particle accelerators. It is also used in the development of cavity resonators for high-frequency applications such as radio astronomy and particle physics experiments.