History of Radio

By macee ba

  • prediction of the existance of radio waves

    prediction of the existance of radio waves
    james clerk maxwell wrote "A Dynamical Theory of the Electromagnetic Field". He stated that the waves can travel through space and time. He made his own electromagnetic theory of light.
  • Period: to

    History of Radio

  • radio waves could be broadcasted into space

    radio waves could be broadcasted into space
    heinrich rudolph hertz demonstrated that rapid variations of electronic currents could be projected into space. radio waves are similar to those of light and heat. cycle per second, was named the "hertz" in his honor.

  • electronic waves could be transmitted wirelessly

    electronic waves could be transmitted wirelessly
    Heinrich Hertz was the first to provide proof that you could transmit and receive electronic waves wirelessly. he concluded that light and heat are electromagnetic waves. He also invented a radar.

  • radios began to appear at sea on ships

    radios began to appear at sea on ships
    this reduced the isolation of ships so that they could hear the news that was all around them providing safety and reliability. Marine VHF radio is a system of radio transceivers on ships for voice communication from ship-to-ship. Guglielmo marconi invented the ship radios.

  • electromagnetic energy wirelessly transmitted

    electromagnetic energy wirelessly transmitted
    Nikola Tesla wirelessly transmitted electromagnetic energy. He made the Tesla coil. he made dozens of breakthroughs in the production, transmission and application of electric power.

  • first radio signal sent

    first radio signal sent
    Guglielmo Marconi an italian inventor sent and received his first radio signal in Italy in 1895. He is known for his pioneering work on long-distance radio transmission and radio telegraph system.

  • first ship to request emergency assistance

    first ship to request emergency assistance
    the rf matthews was the first ship to request emergency assistance using radio technology. radios were a big help with getting help to ships faster.

  • invention of the audion tube

    invention of the audion tube
    Lee De Forest in 1906 created the idea for an audion tube a vacuum tube that amplified signals. It's the first triode, consisting of an evacuated glass tube containing three electrodes: a heated filament, a grid, and a plate.

  • first speech and music transmission

    first speech and music transmission
    reginald fessenden is the first to transmit a program of speech and music. he taught the children how to learn in a fun way. on Christmas Eve in 1906 he broadcasted the first program of music and voice ever transmitted over long distances.

  • first radio transmission from an airplane

    first radio transmission from an airplane
    in 1910 airman walter wellman and five friends crossed the atlantic ocean in the airship america.

  • first continuous broadcast

    first continuous broadcast
    on march 8th 1916 harold power with his radio company research company amrad was the first continuous broadcast in the world.

  • radio stations closed

    radio stations closed
    radio stations not needed by government are closed as world war 1 begins. the president ordered that they be shut down. the radio was used so that they could communicate from person to person in the war.

  • edwin armstrong helps develop radio features

    edwin armstrong helps develop radio features
    Edwin howard armstrong (inventor) is credited with developing many of the features of radio as its known today. Armstrong patented regeneration, superheterodyne circuit and wide band frequency modulation or FM.

  • Compact disc (CD)

    Compact disc (CD)
    The first cd was a recording of claudio arrau preforming chopin waltzes. James russell was the person that invented the compact disc. It was created in Phillips Factory in Germany.

  • compressed audio Mp3

    compressed audio Mp3
    the moving pictures experts group mpeg-1 audio layer 3, in 1991, compressed audio file format and becomes an international standard. It is the most popular format for distributing digital audio over the internet. They made the Mp3 player so that millions of people could listen to their music freely in their pockets.