AI Article Synopsis
- The behavior of sunlight on Earth's surface is influenced by the small angle it creates at the Sun's center, which affects how we observe it in the near-field region.
- Research into the angular characteristics of sunlight's cross-spectral density shows that it exhibits Bessel-like patterns in the far-zone for small angles.
- The methods used in this study can be applied to various geometrical situations beyond just spherical sources.
Article Abstract
It is shown that the observed far-field behavior of sunlight on the earth's surface, located in the near-field region, is due to the small angular width it subtends at the center of the sun. The investigation of the angular behavior of the cross-spectral density function explicitly leads to Bessel-like far-zone behavior for a small angle without any restriction on the value of l. Our general analysis for the spherical source can be easily extended to other geometries.
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| http://dx.doi.org/10.1364/OL.41.004222 | DOI Listing |
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