Radio Waves

(i) Radio waves are electromagnetic signals that are transmitted by an antenna.

(ii) They are Omni-directional waves i.e., they

travel in all the directions from the source.

(iii) "Radio waves" transmit music, conversa tions, pictures and data. For example, AM and FM radio, television, cordless telephone, cellular phones, pagers and wireless LAN etc. use radio waves to communicate. (iv) Radio waves can travel long distances and can penetrate buildings easily. (v) However, these signals get easily affected by rains, thunder storms etc.