A star is said to rise one unit in magnitude when the logarithm of its brightness diminishes by 0.4.
It is much shorter than the typical instruments described, so that the maximum brightness of image is obtained.
The sudden brightness blinded her, and she shielded her eyes.
As if the sun should stop when he had kindled his fires up to the splendor of a moon or a star of the sixth magnitude, and go about like a Robin Goodfellow, peeping in at every cottage window, inspiring lunatics, and tainting meats, and making darkness visible, instead of steadily increasing his genial heat and beneficence till he is of such brightness that no mortal can look him in the face, and then, and in the meanwhile too, going about the world in his own orbit, doing it good, or rather, as a truer philosophy has discovered, the world going about him getting good.
Early in May, the oaks, hickories, maples, and other trees, just putting out amidst the pine woods around the pond, imparted a brightness like sunshine to the landscape, especially in cloudy days, as if the sun were breaking through mists and shining faintly on the hillsides here and there.
The linear dimension of the diffraction pattern is inversely as that of the aperture, and the brightness at corresponding points is as the square of the area of aperture.
Red lead or triplumbic tetroxide, Pb304, is a scarlet crystalline powder of specific gravity 8.6-9.1, obtained by roasting very finely divided pure massicot or lead carbonate; the brightness of the colour depends in a great measure on the roasting.
It cannot be shown that on Greek soil Apollo originally had the meaning of a sun-god; in Homer, Aeschylus and 'Plato, the sun-god Helios is distinctly separated from Phoebus Apollo; the constant epithet cfoi(30s, usually explained as the brightness of the sun, may equally well refer to his physical beauty or moral purity; XvKrJyEV11S has already been noticed.
So long as there is no sensible discrepancy of phase there can be no sensible diminution of brightness as compared with that to be found at the focal point itself.
Such a brightness on the face like the light of heaven, and from the blessed Mother's cheek it drops and drops....