Question

You want to create a device that sends signals to your dog to stop barking. Which type of electromagnetic wave would be most useful to investigate?

Gamma rays, because they are powerful and safe.

Microwaves, because they are high energy and powerful.

Radio waves, because they are low energy and safe.

X–rays, because they are low energy and can pass through things.

Answer 1

I think it would be Radio Waves. Hope this helps! :)

Answer 2

Radio waves

These waves are not high energy so they are safe. This is a reason for their use in telecommunication.