Please help 24 POINTS answer choices:

A) The remote control sends microwaves toward the television that are absorbed by the front of the television.

B) The remote control sends low-energy infrared radiation to a light detector on the front of the television.

C) The remote control sends radio waves in many directions, which bounce off the walls of the room toward the front of the television.

D) The remote control sends sound waves in many directions, which bounce off the walls of the room toward a vibration detector on the front of the television.

B

Explanation:The light waves are caught by the front light sensor on the TV and the remote lets off different variations of light depending what you press.

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