本影发光体(非点光源)所发出光线非透明物体阻挡后,在屏幕(或其他物体)上所投射出来完全黑暗的区域。

此处发光体的光线完全被物体阻挡,而没有任何光线到达。 例如:月食的本影。

Thumb Thumb

参见

Wikiwand in your browser!

Seamless Wikipedia browsing. On steroids.

Every time you click a link to Wikipedia, Wiktionary or Wikiquote in your browser's search results, it will show the modern Wikiwand interface.

Wikiwand extension is a five stars, simple, with minimum permission required to keep your browsing private, safe and transparent.