13182_27799_radio_technology5
Subjects
B&W
Explains electric and magnetic fields, generation of electro-magnetic waves, behavior of radio waves in space, ground wave, reflection and refraction, the ionosphere, and causes of fading.The United Stated map. Kansas city, Denver, St. Louis and Cincinnati are marked. The zone of silence are pointed.Animation diagrams with an antenna on the earth surface with ionosphere in the iced area.Animation diagrams show the interactions of different radio waves.