in the device there is a motion control feature which also has the ability to detect facial expressions..:D
A magnetic device use to detect the revolutions of an entity.
Geiger counter.
A magnetic device use to detect the revolutions of an entity.
No. There are not machines that can detect motion sensors. You may be able to detect the sensor rays through special lighting, but the beams are normally invisible.
Different devices are used to detect different frequency ranges of electromagnetic waves. You simply can't use the same device to detect x-rays, than you would use to detect radio waves, for example.
Laser sensors are generally used to detect motion. They can be used as a safety device to protect something like a car hitting a wall. They can also be used to detect measurement and alignment and are widely used in medicine and industry.
Today, we track tornadoes using a combination of eyewitness reports and Doppler radar.
A device made by J. J. Thomson to process and detect electrons is the?
yes
Magic
A device that bounces laser beams off a reflector to detect fault movements is called a Laser-ranging device