The "Right-Hand Rule" is a simple mnemonic used in physics and engineering to determine the direction of a vector in three-dimensional space. When you align your right hand so that your thumb points in the direction of the first vector, your fingers will curl in the direction of the second vector. The direction your palm faces indicates the direction of the resulting vector, often used in contexts like electromagnetism and rotational motion. This rule is particularly useful in understanding concepts related to magnetic fields, forces, and torque. For example, in electromagnetism, the right-hand rule helps visualize the relationship between current, magnetic fields, and force on a charged particle.