UFO Comments
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Jada 2022-10-21 15:24:54
Aliens like to tease you
Came all the way to the earth, showed up and ran away.
I'm afraid you won't notice me, so I leave a radio wave for you to guess the riddle.
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Professor Hendricks: Chapter four. Eigenvalues and Eigenvectors. Now, if we have a square matrix "A" that represents a linear transformation, then this matrix times the vector is equal to a scalar lambda times the same vector. Now, the "v" is called an eigenvector, and the lambda is called an eigenvalue, and these kinds of problems have applications in all kinds of things, like structural engineering, and spin transitions and neutral hydrogen.
Professor Hendricks: [after a pause] And it has a wavelength of 21 centimeters. That would be significant, wouldn't it? Derek?
Derek: It doesn't matter. The matrix is double, or half, or whatever.
Professor Hendricks: Twenty-one centimeters.
Derek: [confused] Twenty-one centimeters, what?
Professor Hendricks: The frequency of hydrogen. The spectral line of neutral hydrogen has a frequency of 1,420 MHz and a wavelength of 21 centimeters. Two lines, 38 increments east.
Derek: And 22 north.
Professor Hendricks: And then you multiply both by 9,433.
Derek: And then by 21 centimeters. The wavelength is the unit of the measurement. It is coordinates.
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Prologue: Hydrogen atoms emit light at specific energy levels. These energies are determined by the Fine-Structure Constant. Fine-Structure Constant = 0.0072973525664 17. The FSC is a mysterious number that appears in many calculations of the most fundamental physics in our universe but we have no idea where it comes from. The atmosphere, the stars, the air we breathe, even our shoelaces have an atomic makeup that include this enigmatic number. It is a mathematical concept that would be recognized anywhere in the universe. In 1974 Frank, Carl Sagan and several others scientists sent the Arecibo Message into space. It contained basic math and other information intented to establish contact with other life in the universe. They aimed at at the star cluster M13, and the world waited in anticipation for a response bit it would take 22,800 years for the message to reach someone in M13 unless they come to us first.
