Questions tagged [radiation]

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How did they explain the radiation from hot objects at different wavelengths before the concept of atom was widely accepted?

I was reading about blackbody radiation and came across the following quote. Planck did not believe in atoms, nor did he think the second law of thermodynamics should be statistical because ...
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Was Nikola Tesla aware of Maxwell's equations?

Was Nikola Tesla aware of Maxwell's equations or Heinrich Hertz's experimental proof of the former when he worked on his radio device invention?
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Is there a derivation (in English) of the Wien radiation law not based on statistics, other than that found in "Atomic Physics" by Max Born?

The textbook, "Atomic Physics", by Max Born contains a derivation in its appendix of the Wien radiation law that is based only on thermodynamics and Maxwell's laws of E&M. The ...
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6 votes
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What technology was used to determine the shape of the blackbody spectrum at the 19th century?

The shape of the blackbody radiation spectrum was known in the 19th century from experimental measurements, and before the theoretical discovery of Planck's law. At those times, how did people manage ...
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How is it possible that Pierre and Marie Curie's daughter Ève was so healthy?

I know that problems caused by radiation are pretty much random and unexpected at low levels of exposition but this randomness begins to be more probable when the exposition grows and this makes me ...
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How much radiation did the Curies get while synthetising Radium?

While Marie Skłodowska's husband, Pierre Curie, died in a traffic accident, she died of cancer. Various sources claim that the radiation she got during their experiments might have contributed ...
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Some questions about radioactivity around 1900

All the questions are closely related to each other therefore, in my opinion, it wouldn't make much sense to ask them separately. I'm trying to find the answers in historical context. I appreciate ...
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2 answers
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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?
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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 ...
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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-...
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4 votes
1 answer
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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?
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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 ...
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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 ...
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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 ...
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