In theory, after a spirit/ghost has manifested there is some density to the “ghost form.” While the ghost is moving around some people think that if the ghost passes in front of the Infrared (IR) beam and/or motion sensor it will either break the laser beam, being able to see the movement of the ghost or trigger the device to light up or sound an alarm, depending on the type of device being used, alerting the investigator of activity.
Listed below are some of the devices that can be used in testing this theory:
A MOTION SENSOR will pick up any kind of movement that passes in front of the sensor by shooting out an IR beam. When the beam gets broken, the sensor goes off by lightning up.
A MOTION SENSOR IR CAMERA will pick up any kind of movement that passes in front of the sensor by shooting out an IR beam. When the beam gets broken, the sensor goes off and takes a photograph or video.
A LASER PROJECTOR can be used to project a light grid on a wall or cover a room and if a ghost moves in front of the beams you will be able to detect the size and the direction of which the ghost is moving.
A CLASS 2M LASER can be used to project a cross line grid on a wall or cover a room and if a ghost moves in front of the beams you will be able to detect the size and the direction of which the ghost is moving.