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Oliver Lodge and radio signals
Jim Al-Khalili describes the lecture that Oliver Lodge gave in 1894 which demonstrated James Maxwell's theory of electromagnetism. Lodge used equipment to generate an alternating current to spark across a gap between two electrodes. This generated an electromagnetic wave which sounded a bell on another devise. This experiment formed the basis of radio communication. First broadcast in 'Shock and Awe: the story of electricity' on BBC Four in October 2011.
Could be useful to show the historical significance of this experiment. Students could be asked to take notes during the clip and then explain the discovery to each other. This could then be written into a flow diagram summary of the key points.
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