Electromagnetic Waves and Communication

Electromagnetic Waves

• Transverse waves composed of electric and magnetic disturbances.
• Includes radio waves, microwaves, and infrared waves.
• Capable of transmitting information over long distances.

Guglielmo Marconi

• 1800s: Invented and developed the wireless telegraph.
• Enabled sending messages hundreds of kilometers at the speed of light without wires.
• Early signals used long and short pulses, translatable via codes like Morse code.

Technological Advancements

• Development of vacuum tubes led to the birth of radio and television.