Question

Which electromagnetic waves are invisible and have the longest wavelengths, ranging from a few inches to longer than a football field?

Answer 1

Radio waves are the longest and impossible to see. You would commonly recognize radios waves from a ham radio. Radio waves are able to travel extreme distances in order to communicate with others farther away.

Answer 2

Radio waves

Step-by-step explanation:

According to a different source, these are the options that come with this question:

A. infrared radiation

B. ultraviolet radiation

C. radio waves

D. microwaves

Radio waves are the electromagnetic waves that are invisible and have the longest wavelengths. This type of electromagnetic radiation has frequencies that are as high as 300 gigahertz (GHz) to as low as 30 hertz (Hz). Radio waves are very useful in modern life, as they can be created artificially by transmitters and received by radio receivers. They are used in a varuety of settings and devices, such as communications, broadcasting, satellites, computer networks, etc.