Description: In physics, a region in which each point is affected by a force. Objects fall to the ground because they are affected by the force of earth's gravitational field (see gravitation). A paper clip, placed in the magnetic field surrounding a magnet, is pulled toward the magnet, and two like magnetic poles repel each other when one is placed in the... ( +expand to view full text )

Description: In physics, a region in which each point is affected by a force. Objects fall to the ground because they are affected by the force of earth's gravitational field (see gravitation). A paper clip, placed in the magnetic field surrounding a magnet, is pulled toward the magnet, and two like magnetic poles repel each other when one is placed in the other's magnetic field.