In our time today, if the use of EM waves hasn’t been discovered yet, it will be hard to communicate to people we care about, especially right now, we are currently facing a pandemic crisis, but thanks to the EM waves, we can communicate with our acquaintances with just one click.
EM waves also helped us travel without looking in a map. With our GPS, we can travel anywhere by inputting the location we want to go and listen to the direction GPS says.
EM waves are also used in the medical field, without x-ray, it will be hard for the doctors to determine internal fractures we have. It is also used to fight cancer.