Inventors and Innovators of Electromagnetic Waves - A Historical Perspective
Explore the fascinating history of electromagnetic waves through the stories of inventors like Marconi and Bose. Discover how scientific theories evolve over time and the contributions of global scientists to radio technology development.
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Presentation Transcript
Electromagnetic Waves GCSE Physics Diversity in Science Teaching Pack
Uses of electromagnetic waves A radio detects radio waves and turns the signal into sound.
Who invented the radio? In the new era, thought itself will be transmitted by radio. The Italian physicist Guglielmo Marconi firsttested his radio design in 1895. In 1897, Marconi received a patent for his invention. Guglielmo Marconi (1874 1937)
But dont forget In 1895, the Indian physicist Jagadish Chandra Bose built his own radio transmitter and receiver. He tested it in front of the public in Calcutta Town Hall, in Bengal, India. It worked! This was the same year that Marconi tested his own invention. J. C. Bose (1858 1937)
Properties of electromagnetic waves J. C. Bose also helped identify important properties of radio waves. He did experiments which showed that radio waves could be: Polarised Refracted Absorbed An experiment set up by J. C. Bose
So who invented the radio? Question: How important are patents? Guglielmo Marconi (who received a patent) or J. C. Bose (who did a public demonstration) Optional Activity
How do scientific theories and methods develop over time? Science isn t made by individuals. But patents and prizes are often awarded to individual scientists. Scientists build on each other s ideas. Marconi used some of Bose s ideas in his later radio designs.
And whilst were here Scientists from around the world helped develop radio technology. Here are just a few: Alexander Popov Nikola Tesla Hidetsugu Yagi (Japan) Hedy Lamarr (Austria and USA) (Russia) (Serbia and USA)
Specification and Licence Electromagnetic Waves AQA Physics Specification WS1.1 Understand how scientific methods and theories develop over time WS 1.4 Explain everyday and technological applications of science 4.6.2 Electromagnetic waves GCSE Physics: Diversity in Science Teaching Pack Developed by James Poskett (University of Warwick) Licence: https://creativecommons.org/licenses/by-nc-sa/3.0/
