Questions tagged [radiation]

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2answers
168 views

Who discovered Bremsstrahlung?

I found a web page that says that it was discovered by Tesla in 1890, is that true or generally acknowledged? Isn't 1890 too early a date?
4
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1answer
73 views

What/When was the first radio nav system capable of triangulating your position?

What was the first radio navigation system capable of triangulating your position, and when was it built? How accurate was it and what was its range? This does not have to be GPS or a satellite ...
3
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1answer
297 views

Philipp Lenard and the Curies

The grudge (to say the least) of Philipp Lenard against Einstein is well-known. But he also held a grudge against the Curies. For instance at the book The Man Who Stalked Einstein, by Birgit Ertl-...
4
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1answer
1k views

Who determined the temperature of the Sun first?

It is commonplace that it is about 6000 Kelvin. But who came to this value first? And with what method? Based on the black body radiation theory?
3
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2answers
336 views

Wireless transmission and speed of light in Weber Electrodynamics

The telegraph model of Weber-Gauss, relying on Weber's electrodynamics, modeled instantaneous action at a distance of the electric scalar potential (Coulomb potential) manifesting as propagation of ...
13
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1answer
569 views

When and how was ionizing radiation found to be harmful?

The discoverers of radioactivity and its potential uses are renowned, e.g. Madame Curie and Roentgen. When was it discovered that human exposure to ionizing radiation including radioactive isotopes ...
10
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1answer
661 views

When and how was UV radiation found to be dangerous to human skin?

It is pretty common knowledge nowadays that prolonged exposure to solar ultraviolet radiation is dangerous to human skin, potentially resulting in cancers such as melanoma and photoaging. A bit of ...