Question

which type of electromagnetic wave do cell phones send and receive?
a. microwaves
b. x - rays
c. ultraviolet waves
d. infrared waves

Explanation:

Cell - phones use microwaves for communication. Microwaves have the appropriate frequency range to carry voice and data signals over long distances through the air for mobile - phone networks. X - rays are used in medical imaging and have high energy and potential harm. Ultraviolet waves are mainly associated with sunburn and some disinfection processes. Infrared waves are used in remote controls and thermal imaging.

Answer:

A. Microwaves