Перевести на русский . 5. These magic waves come from everywhere . Turn the knob of your radio just a little ,and you may hear children in Moscow. Turn a little more and you may hear news from Alma-Ata,or a concert from Kemerov...

Перевести на русский . 5. These magic waves come from everywhere . Turn the knob of your radio just a little ,and you may hear children in Moscow. Turn a little more and you may hear news from Alma-Ata,or a concert from Kemerovo.Turn the knob of your television set and with the help of these same waves you will see a film or a play from many different towns and cities . 6.All you need to do is to take the set into your room and to turn some little knobs! 7.How are these waves brought to your radio or television ?There is energy working around us all the time .This energy is in light , heat and sound and it travels in wave . Wave is a single vibration of energy in motion. 8. Light and heat and radio waves are different from round waves because they do not need anything that we can see or feel through which to travel. Light and heat and radio waves are called electromagnetic waves . And because they are electric they ate surrounding by the magnetic fields that electricity always makes around itself . 9. All electric current creates a magnetic force ,an area around , that has the same kind of power that a real magnet has .This magnetic area around an electric current is called a magnetic field used to generate electricity .