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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05/03/2025 alle ore 08:30
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