History Of Radio

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History Of Radio

  1. 1. History of radio Rasmus Laan 10.a
  2. 2. <ul><li>Electricity and magnetsim can cause radio waves – Heinrich Hertz </li></ul><ul><li>In 1905 a continuous wave voice transmitter was invented </li></ul><ul><li>First coast-to-coast radio transmissions were sent out in 1915 </li></ul>
  3. 3. <ul><li>The ´´father of radio´´ is awarded to Lee De Forest </li></ul>
  4. 4. The first radio programs <ul><li>In 1912 Charles Herrold began to broadcast in San Jose </li></ul><ul><li>Frank Conrad broadcasted music from his garage </li></ul>
  5. 6. What to we get from the radio? <ul><li>News </li></ul><ul><li>Interviews </li></ul><ul><li>Talk shows </li></ul><ul><li>Music </li></ul><ul><li>Birthday congratulations </li></ul><ul><li>Etc. </li></ul>
  6. 7. Radio today <ul><li>Over 44 000 radio stations </li></ul><ul><li>Milliards of radios </li></ul>
  7. 8. <ul><li>Thank you all for your attention! </li></ul>
  8. 9. <ul><li>http://en.wikipedia.org/wiki/History_of_radio </li></ul><ul><li>http://history.sandiego.edu/GEN/recording/radio2.html </li></ul><ul><li>http://history.sandiego.edu/GEN/recording/radio.html </li></ul><ul><li>http://radio.about.com/cs/funradiothings/f/radiofaq2.htm </li></ul>

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