Opposition surge

Rarity: Common

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At a glance

Class

Notion

Domain

Science and technology

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What Wikipedia says

The opposition surge (sometimes known as the opposition effect, opposition spike or Seeliger effect) is the brightening of a rough surface, or an object with many particles, when illuminated from directly behind the observer.

Excerpt from the Wikipedia article “Opposition surge”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: NASA/JPL-Caltech/UCLA/MPS/DLR/IDA, Public domain, via Wikimedia Commons.