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On Thursday, September 19, 1985, at 7:19 am local time, Mexico City was struck by an earthquake of magnitude 8.1 on the Richter scale. Although this earthquake was not as deadly or destructive as many similar events in Asia and other parts of Latin America, it proved to be a disaster politically for the one-party government. The government was paralyzed by its own bureaucracy and corruption, forcing ordinary citizens to create and direct their own rescue efforts and to reconstruct much of the housing that was lost as well.

How strong was the powerful earthquake that hit Mexico City in 1985?
Answer: 8.1 on the Richter scale
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The regions in their inventory were Assyria, Chaldea, Mesopotamia, Persia, Armenia, Egypt, Arabia, Syria, Palestine, Ethiopia, Caucasus, Libya, Anatolia and Abyssinia. Explicitly excluded is India. No mention is made of the Balkans.

What region has no mention?
Answer: the Balkans
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The assumption that black-body radiation is thermal leads to an accurate prediction: the total amount of emitted energy goes up with the temperature according to a definite rule, the StefanBoltzmann law (187984). But it was also known that the colour of the light given off by a hot object changes with the temperature, so that "white hot" is hotter than "red hot". Nevertheless, Wilhelm Wien discovered the mathematical relationship between the peaks of the curves at different temperatures, by using the principle of adiabatic invariance. At each different temperature, the curve is moved over by Wien's displacement law (1893). Wien also proposed an approximation for the spectrum of the object, which was correct at high frequencies (short wavelength) but not at low frequencies (long wavelength). It still was not clear why the spectrum of a hot object had the form that it has (see diagram).

What law describes the changes in light emitted by a hot object?
Answer:
StefanBoltzmann law