Electromagnetic propagation

Electromagnetic propagation is like sending messages using invisible waves that travel through the air, just like sound waves that travel through the air and we can hear them as sound. Electromagnetic waves are special because they can travel through the air, empty space, and even through walls.

When we talk on a phone, we are actually sending our voice using electromagnetic waves. These waves are produced by the phone and travel through the air. They enter the antenna of the other phone and are converted back into sound that we can hear.

This process is called electromagnetic propagation. It is used in many things we use every day, like radios, TVs, WiFi, and even microwave ovens.

The waves used in electromagnetic propagation have different wavelengths and frequencies. Wavelength is the distance between two wave peaks, while frequency is how many waves pass by in a certain amount of time.

By adjusting the wavelength and frequency, we can use electromagnetic propagation for different purposes. For example, radios use low frequency and long wavelength waves, while WiFi and cell phones use high frequency and short wavelength waves.

In summary, electromagnetic propagation is like sending secret messages through invisible waves that travel through the air and can be used to send information in many different ways.