Apolice officer uses a radar gun to determine the speed of a car. a specialized radar gun uses ultraviolet light to determine the speed. what describes the wave used? check all that apply. transverse longitudinal heat electromagnetic sound

a  radar speed gun  (also  radar gun  and  speed gun) is a device used to measure the speed of moving objects. it is used in law-enforcement to measure the speed of moving  vehicles  and is often used in professional spectator sport, for things such as the measurement of bowling speeds in cricket, speed of pitched  baseballs, athletes and tennis serves.

electromagnetic shielding is the practice of reducing the electromagnetic field in a space by blocking the field with barriers made of conductive or magnetic materials. shielding is typically applied to enclosures to isolate electrical devices from their surroundings, and to cables to isolate wires from the environment through which the cable runs. electromagnetic shielding that blocks radio frequency electromagnetic radiation is also known as rf shielding.

the shielding can reduce the coupling of radio waves, electromagnetic fields and electrostatic fields. a conductive enclosure used to block electrostatic fields is also known as a faraday cage. the amount of reduction depends very much upon the material used, its thickness, the size of the shielded volume and the frequency of the fields of interest and the size, shape and orientation of apertures in a shield to an incident electromagnetic

from wikipedia