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Here is described a simple process to 'put a voice on a sunbeam' and transmit it over a distance. It is a fascinating example of amplitude modulation of light using sound vibrations. It then describes how the modulated light is detected and demodulated in a receiver so that we can hear the sound. A wide range of physics and engineering experience can be learnt through these exciting 'sunbeam' experiments. These activities are inexpensive and can be made in a school laboratory or at home.
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- Knovation Readability Score: 5 (1 low difficulty, 5 high difficulty)
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