What kind of waves do cell phones use?

Cell phones send signals to (and receive them from) nearby cell towers (base stations) using RF waves. This is a form of energy in the electromagnetic spectrum that falls between FM radio waves and microwaves.

What type of electromagnetic waves are used in security alarms?

Infrared (IR) light is used by electrical heaters, cookers for cooking food, short-range communications like remote controls, optical fibres, security systems and thermal imaging cameras which detect people in the dark.

How are radio waves detected?

Radio waves are received by another antenna attached to a radio receiver. When radio waves strike the receiving antenna they push the electrons in the metal back and forth, creating tiny oscillating currents which are detected by the receiver.

Does GPS use radio waves?

GPS receivers use radio waves to determine positional coordinates. The radio waves are emitted by a constellation of orbiting satellites, which function as a reference system for GPS.

Do televisions use radio waves?

Radio waves do more than just bring music to your radio. They also carry signals for your television and cellular phones. The antennae on your television set receive the signal, in the form of electromagnetic waves, that is broadcasted from the television station. It is displayed on your television screen.

How are infrared waves used in intruder alarms?

Burglar alarms are designed to detect the IR rays from an intruder. Infra-Red is unconsciously continuously used whenever we are in front of a TV set. A remote control transmits IR, with a receiver in the TV. Consequently, the IR wave gives a signal to the set to switch on to another channel.

What is radio waves in electromagnetic spectrum?

Radio waves are a type of electromagnetic radiation with wavelengths in the electromagnetic spectrum longer than infrared radiation. Radio waves have frequencies as high as 300 gigahertz (GHz) to as low as 30 hertz (Hz).