Question

question 8 of 10
why are networks of cables not used to send information from a remote
control to a television?
a. cables slow down the speed at which information is
communicated.
b. microwaves cannot travel through cables.
c. the information needs to travel only a short distance.
d. infrared radiation cannot travel through cables.

Explanation:

When a TV is started, the remote control sends a signal (usually infrared) to the TV. The distance between the remote and the TV is short. Cables are not used as they are mainly for longer - distance wired connections. Option A is wrong as cables don't slow down communication speed (in fact, they can be fast for wired signals). Option B is incorrect as microwaves can be transmitted through air (e.g., in wireless communication, not relevant here). Option D is wrong as infrared can travel through air (which is how remote controls work without cables).

Answer:

C. The information needs to travel only a short distance.