Apaperweight is made of a solid glass hemisphere of index of refraction 1.55. the radius of the circular cross section is 5.0 cm. the hemisphere is placed on its flat surface, with the center directly over a 1.5 mm long line drawn on a sheet of paper. what length of line is seen by someone looking vertically down on the hemisphere?

Assume that two of the electrons at the negative terminal have attached themselves to a nearby neutral atom. there is now a negative ion with a charge -2e at this terminal. what are the electric potential and electric potential energy of the negative ion relative to the electron? the electric potential and the electric potential energy are both twice as much. the electric potential is twice as much and the electric potential energy is the same. the electric potential is the same and the electric potential energy is twice as much. the electric potential and the electric potential energy are both the same. the electric potential is the same and the electric potential energy is increased by the mass ratio of the oxygen ion to the electron. the electric potential is twice as much and the electric potential energy is increased by the mass ratio of the oxygen ion to the electron.