Site for children

P About H E M The H To And

How does the antenna?

AntennaWe have already acquainted you with photons. These particles are different and have different properties. Among photons are those who have very little energy. They are called radio waves. Thanks to them we can listen to radio and watch TV.

But every modern man knows that the work of television and radio depends on an antenna. As the antenna catches radio waves? Antennas are made from metals that have a lot of free electrons under the influence of an electric field from radio waves begin to move. The electric field of the wave is directed in one direction and then in the other direction, respectively, and the electrons in the antenna move where directed electric field. This movement of electrons is called an electric current. From the antenna the current goes through a special wire to the TV, where it is amplified and decoded.


Please rate the answer:
1 2 3 4 5

Total votes: 19
Your name (nick):
Enter the result of the calculation


  © 2014 All children