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Measurement of Aerosols Optical Thickness of the Atmosphere using the GLOBE Handheld Sun Photometer

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Laboratory experiments in atmospheric optics.

M Vollmer, R Tammer

|April 29, 2009

Summary

This summary is machine-generated.

This study presents laboratory experiments on atmospheric optics, including mirages, rainbows, and halos. These experiments demonstrate optical principles and aid in understanding light scattering phenomena in water droplets and ice crystals.

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Area of Science:

Atmospheric optics
Light scattering
Geometrical optics

Background:

Atmospheric optical phenomena like mirages, rainbows, and halos are visually striking but complex.
Understanding these phenomena requires knowledge of light propagation and interaction with atmospheric particles.

Purpose of the Study:

To present a range of laboratory experiments, both old and new, on atmospheric optics.
To provide didactical demonstrations for understanding fundamental optical principles.
To facilitate quantitative comparison between experimental results and theoretical models for light scattering.

Main Methods:

Qualitative demonstrations illustrating concepts such as curved light rays and rainbow paths.
Quantitative experiments involving measurement of angular positions and intensities.
Analytical computations and Monte Carlo simulations of light scattering from water droplets and ice hexagons.

Main Results:

Demonstrations successfully illustrate the existence of curved light rays in refractive index gradients.
Minimum-deviation curves for rainbow paths and contributing ray classes for halos were visualized.
Quantitative experiments showed good agreement with analytical and simulation results for light scattering.

Conclusions:

Laboratory experiments are effective tools for teaching and understanding atmospheric optical phenomena.
Quantitative comparisons validate theoretical models for light scattering in water droplets and ice crystals.
Complex halo phenomena can be better understood through experimental and simulation-based approaches.