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Two modern electric lamps with lampshades. A lampshade is a fixture that envelops the light bulb on a lamp to redirect the light it emits. The shade is often affixed onto a light fixture to reduce the intensity of the light to observers, shield the light from a harsh environment, or for decoration by altering the color or creating shadows.
In optics, chromatic aberration (CA), also called chromatic distortion, color aberration, color fringing, or purple fringing, is a failure of a lens to focus all colors to the same point. [ 1 ] [ 2 ] It is caused by dispersion : the refractive index of the lens elements varies with the wavelength of light .
Fringe trim applied to a reproduction drapery design in the Vermont Senate Chamber of the Vermont State House. Moccasin with fringe. A Fringe is an ornamental textile trim applied to an edge of a textile item, such as drapery, a flag, or epaulettes. Fringe originated as a way of preventing a cut piece of fabric from unraveling when a hemming was
Lamps from the 1890s consisted of a stand, font, chimney, and often a shade. [24] The font (also spelled "fount") held the kerosine for the lamp. [ 25 ] The chimney was a glass tube placed around the lamp's flame that had a bulge at the base that kept drafts away from the flame and added extra illumination. [ 26 ]
How interference works. The distance between the bright fringe (a) and the dark fringe (b) indicates a change in the light path length of 1/2 the wavelength, so a change of the width of the gap of 1/4 wavelength. So the distance between two bright or dark fringes indicates a change in the gap of 1/2 wavelength.
Victor VIRGILE / Getty Images. This year, expect gowns to be bolder and more spectacular than ever. In 2025, we're bidding farewell to the quiet luxury trends and embracing bold, statement-making ...