Write short notes on Spherical Joint (with reference to robotics).

A spherical joint is also known as a ball-and-socket joint, which allows rotational movement in multiple directions around a single point. This joint provides three degrees of freedom viz. pitch (up/down), yaw (left/right) and roll (rotation around the axis), enabling more complex and flexible motions. The joint consists of a ball fitting into a socket, similar to the human shoulder or hip joint, enabling fluid and multi-directional movement. Spherical joints are used in humanoid robots, particularly at the shoulders and hips, in robotic arms for flexible movement, and also in camera gimbals and drones for smooth, multi-axis movement.