Question

Uses of electromagnetic waves to transmit cell phone signals and telephone signals

Answer 1

The answer is infrared waves. Many of the most common uses of infrared radiation are in the area of electronics, as infrared light can be used to transmit signals and data over small spaces. Remote controls, for instance, commonly use infrared light to transmit signals for controlling devices such as televisions and other household electronics, so it can be used for cell phones.

Answer 2

An antenna converts an electric signal to the transmitter and same the other way around. :)