Tag Archives: radio

The First Mobile Phone?

In 1879, Professor David Hughes noticed that a clicking noise occurred in his home-made telephone whenever he used his induction balance. Hughes eventually found that the induction balance had a loose contact, and that the clicking went away when the contact … Continue reading

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Did the Radio Telegraph lead to a Miscarriage of Justice?

In an earlier blog, we learned how Cooke and Wheatstone’s telegraph played a central role in the capture of the murderer John Tawell as he travelled by train from Slough to London. In an analogous case, the murderer Dr Hawley … Continue reading

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Are Radio Waves Bad for Your Health?

The health risks associated with radioactivity have been recognized for many years. Alpha, beta and gamma emissions from radioactive sources can ionize atoms or molecules that they encounter by detaching electrons from them. People exposed to high levels of ionizing … Continue reading

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Let’s Hear It for the Bad Boys of Physics!

Surprising as it may seem, there are still some major barriers that are holding back the march of telecommunications. One of these barriers is Einstein’s universal speed limit – the speed of light – which applies to electrical currents in … Continue reading

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A Festive Story from the History of Radio

The important role played by Guglielmo Marconi in the development of radio technology has rather obscured the achievements of other radio pioneers, and the Canadian Reginald Fessenden has been sadly overlooked. While Marconi focused on radio telegraphy, Fessenden looked for … Continue reading

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Synopsis

Here’s a brief summary of each chapter. Chapter 1:  The Birth of an Industry This chapter chronicles the early years of the electric telegraph. It starts with the chaotic scenes in the US congress when – after many setbacks – Samuel … Continue reading

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