What are electromagnetic signals?

Electromagnetic signals are like invisible messages that travel through the air and help your favorite toys and gadgets work.

Imagine you have a radio, when you turn it on and pick a station, music starts playing. That’s because the radio is receiving electromagnetic signals, which are like waves sent out by a radio tower far away. These waves travel through the air just like ripples in a pond when you throw a stone into it.

Think of electromagnetic signals as waves made of energy, they can move through space, and devices like radios, phones, or even your smartwatch can catch them and turn them into sound, pictures, or messages.

When you send a text from your phone to a friend’s, it uses these invisible waves too! It's like sending a note that floats through the air until it lands in your friend’s phone.

These signals don’t need wires, they just need space to travel, kind of like how you can shout across a playground and still be heard.