Light of intensity 2.00 w/m2 passes through the pupil of one of your eyes and eventually falls on your retina. the radius of the pupil is controlled by the iris. in a human eye, the radius of the pupil can vary from about 1.0 mm to about 3.5 mm. the area of the opening can be calculated from pi (3.1416) times the radius squared. if your pupil is open to a radius of 3.5 mm, how much light energy passes through in one minute? give your answer in millijoules.

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.