inventors and inventions: the radio

Inventors and Inventions:Inventors and Inventions:The RadioThe Radio

The Real Madrid :Khizer ( Group Leader )Megan ( Resource Manager )Patricia ( Scribe )Darren Lim ( Quiet Captain )

Who was the inventor / Who was the inventor / inventors?inventors?They were :Heinrich Hertz ,Édouard Branly ,Nikola Tesla ,Roberto Landell de Moura ,Oliver Joseph Lodge ,Jagadish Chandra Bose ,Ernest Rutherford , andFerdinand Braun.

Heinrich HertzHeinrich Hertz

His full name was Heinrich Rudolf Hertz.

He was born on February 22 1857 and he died on January 1 1894.

The history of the radioThe history of the radio

The first radio news program was broadcast August 31, 1920 by station 8MK in Detroit, Michigan, which survives today as all-news format station WWJ under ownership of the CBS network.

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RadioRadio

AM radio uses amplitude modulation, while FM uses frequency modulation.FM signal is not subject to static and interference in the same way as AM signals. Due to its need for a wider bandwidth, FM is transmitted in the Very High Frequency (VHF, 30 MHz to 300 MHz) radio spectrum. ( It is like light. )

RadioRadio

We like his invention because his invention contributed greatly towards many political, economy, and national events.Not only do we access to entertainment and news, we can also access the in the comfort of our homes.

Values shown by the Values shown by the inventorsinventorsPerseveranceOpen-mindedness

Radio wavesRadio waves

The radio started with the discovery of "radio waves" - electromagnetic waves that have the capacity to transmit music, speech, pictures and other data invisibly through the air.

Here is a video about how Here is a video about how the radio worksthe radio workshttp://www.youtube.com/watch?v=en2AeCKvlN0&feature=related

Thank you for your Thank you for your attention.attention.Done by : Group J, The Real Madrid

Members :Khizer ( Group Leader )Megan ( Resource Manager )Patricia ( Scribe )Darren Lim ( Quiet Captain )