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.

When the slit of the spectroscope is set across a spot, it shows, as might be expected, a general reduction of brightness as we pass from the photosphere to the penumbra; and a still greater one as we pass to the umbra.

Marcion, for example, regarded the body of Christ merely as an "umbra," a "phantasms."

All but the smallest spots show a dark central portion called the umbra with a lighter outer area called the penumbra.

If you're looking for affordable, stylish ways to dress up the windows in your home, consider using Umbra curtain rods.

Umbra is a home design company formed in 1979 with the first product, a window shade, giving the company its name; "umbra" is "shade" in Spanish.

For a company which had its start with window shades, curtain rods are an important part of the Umbra catalogue.

Tension rods work similarly to shower curtain rods and are available at Umbra in modern and classic styles.

If you have old world style decorating in your home, consider the Orly, Doric or Lyric style rods at Umbra.

Whether you are looking for swing arm rods, tension rods or something more substantial, Umbra has several curtain rods to choose from in contemporary designs.

This may be the reason that Umbra has the most styles to choose from in this category.

Whether you want subtle detail like the Capella rod, or you want more of a statement like the Imperial rod makes, Umbra has you covered with their classic curtain rod styles.

To complete the look of your window treatments and complement your new curtain rod, consider using any of the following curtain accessories from Umbra as well.

In addition to curtain rods of every style, Umbra also carries window panels.

Umbra curtain rods deliver style and durability for an affordable price.

No matter what style of room, size of window or type of window treatment you are considering, Umbra's curtain rods and drapery sets are sure to work.

Whether you are looking for bay window curtain rods, wrought iron rods to complete an Old World look or something sleek and contemporary, Umbra has the range of styles that you are looking for.

Because curtains and draperies are often made up of several components, including the rod, drapes, tie backs and finials, Umbra curtain rods also reasonably priced.

Just as there are numerous styles of interior design, so are their numerous types of curtain rods to choose from at Umbra.

The largest spots are easily seen by the naked eye, if the brilliancy of the disk is veiled; the umbra may be many - ten or more - diameters of the earth in breadth.

Some lines of certain elements are always seen fainter or thinner than on the photosphere, or even wholly obliterated; others sometimes show the same features, but not always; other lines of the same elements, perhaps originating at a level above the spot, are not affected; there are also bright streaks where even the general absorption of the spot is absent, and sometimes such a bright line will correspond to a dark line on the photosphere; most generally the lines are intensified, generally in breadth, sometimes in darkness, sometimes in both together, sometimes in one at the expense of the other; certain lines not seen in the photosphere show only across the umbra, others cross umbra and penumbra, others reach a short distance over the photosphere.

His attitude about this time to life and experience is reflected in Pulvis et umbra, one of the noblest of all his essays.

About the same time Francesco Maurolico, or Maurolycus, the eminent mathematician of Messina, in his Theore y nata de Lumine et Umbra, written in 1521, fully investigated the optical problems connected with vision and the passage of rays of light through small apertures with and without lenses, and made great advances in this direction over his predecessors.

John Fleischer (sometimes incorrectly named Fletcher), of Breslau, propounded the same view in a pamphlet, De iridibus doctrina Aristotelis et Vitellonis (1574) the same explanation was given by Franciscus Maurolycus in his Photismi de lumine et umbra (1575) The most valuable of all the earlier contributions to the scientific explanation of rainbows is undoubtedly a treatise by Marco Antonio de Dominis (1566-1624), archbishop of Spalatro.