Question

what part of the em spectrum do we use for communication wave technology? visible light & radio waves radio waves & microwaves microwaves & visible light infrared & gamma waves

Explanation:

In the electromagnetic (EM) spectrum, radio waves and microwaves are commonly used for communication technologies (e.g., radio, TV, mobile phones, Wi - Fi). Visible light is not typically used for broad - scale communication in the same way, infrared has limited communication applications compared to radio and microwaves, and gamma rays are not used for communication due to their high energy and harmful nature. So the correct part of the EM spectrum for communication wave technology is radio waves & microwaves.

Answer:

radio waves & microwaves