Question

1.What are the two things needed to detect the motion of an object?​

Answer 1

A motion detector is a device that detects moving objects, particularly people. Such a device is often integrated as a component of a system that automatically performs a task or alerts a user of motion in an area. An occupancy sensor detects the presence of an entity within a certain space.

Motion controllers are also used for video game consoles as game controllers. A camera can also allow the body's movements to be used as an input device, such as in the Kinect system.