Umbra Definition

Umbra Sentence Examples

• The notions of the penumbra and umbra are important in considering eclipses (q.v.).

• The umbra in the former case becomes the fully illuminated portion, and vice versa.

• Each spot shows with more or less completeness a ring-shaped penumbra enclosing a darker umbra; the umbra, which looks black beside' the photosphere, is actually about as brilliant as limelight.

• In a partial lunar eclipse, it partly enters the umbra and only part of its surface is darkened.

• Readers of Dante know the idea that the dead have no shadows; this was no invention of the poet's but a piece of traditionary lore; at the present day among the Basutos it is held that a man walking by the brink of a river may lose his life if his shadow falls on the water, for a crocodile may seize it and draw him in; in Tasmania, North and South America and classical Europe is found the conception that the soul - o-tab., umbra - is somehow identical with the shadow of a man.