How does a world receiver work and what can you do with it?

You know sound waves. There are other invisible waves called electromagnetic waves. Waves have a frequency (given in Hertz=Hz), so how often per second they swing. You can send and receive these waves to transmit information. So on the radio, satellite TV. A transmitter transmits at a specific frequency, e.g. to 89 MHz, so a wave with this frequency is used to transmit audio. If you set the receiver to 89 MHz, these audio information will be extracted. There are many stations. So that there is no chaos, it’s all regulated. So who can send on what frequency with what strength.

It is possible to divide frequencies into different sections. Short wave is the range of 3-30 MHz (l. wiki), i.e. 3-30 million. Vibrations per second. UKW is another area, etc. On the device, you can switch which area you want to receive. Then set the specific frequency within the range.

By the way, light waves are just as electromagnetic waves, only in a much higher frequency range. We have built-in receivers: eyes 😉 The different colors differed only by their frequency, i.e. the difference between green, blue, etc. is only their different frequency (simply stated). Light waves are used for information transmission, e.g. in the case of optical fiber Internet.

Microwaves, radar waves, X-rays, etc. are all forms of electromagnetic waves, only with different frequencies. If you have understood 1x in life, it can explain half life. ;