Suggested Mutual Repulsion of Fraunhofer Lines

On the Suggested Mutual Repulsion of Fraunhofer Lines.

Fraunhofer effect atomic absorption spectrometry.

The dark lines in the solar spectrum were discovered by Wollaston and cataloged by Fraunhofer in the early days of the 19th century. Some years later, Kirchhoff explained the appearance of the dark lines: the sun was acting as a continuum light source and metals in the ground state in its atmosphere were absorbing characteristic narrow regions of the spectrum. This discovery eventually spawned ...

Stable Swarming by Mutual Interactions of Attraction/Alignment/Repulsion: Fixed Topology

In this paper we present a general decentralized controller for a swarm of mobile agents with fixed topology to move in a given environment. The controller utilizes the widely accepted hypothesis of Attraction/Alignment/Repulsion (A/A/R) interactions for fish schools in mathematical biology community. We assume that during the swarm’s motion, each agent can sense and interact with its neighbors...

Fraunhofer diffraction of light by human enamel.

Fraunhofer diffraction patterns of human enamel samples were photographed with a helium-neon laser beam (lambda = 633 nm). The first-order diffraction angle was in reasonable agreement with a prediction based upon enamel prisms acting as a two-dimensional grating. These results support the hypothesis that enamel diffracts light because of the periodic structure of enamel prisms with interprisma...

Retrieval of Terrestrial Plant Fluorescence Based on the In-Filling of Far-Red Fraunhofer Lines Using SCIAMACHY Observations

Chlorophyll fluorescence is directly linked to the photosynthetic efficiency of plants. As satellite-based remote sensing has been shown to have the potential to derive global information about fluorescence it has become subject of various recently published studies stimulating an upsurge in this research field. This manuscript presents a simple and fast retrieval method for solar induced terre...