optical depth

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Mayer Amschel Rothschild (1744-1855), founder of the house of Rothschild; lithograph by Friedrich Lieder, c. 1830.

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8 of the Largest Empires in History

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optical depth

physics

Learn about this topic in these articles:

Saturn’s rings

In Saturn: The ring system
…is broadly described by their optical depth as a function of distance from Saturn. Optical depth is a measure of the amount of electromagnetic radiation that is absorbed in passing through a medium—e.g., a cloud, the atmosphere of a planet, or a region of particles in space. It thus serves…
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