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The ribbon of Saint George (also known as Saint George's ribbon, the Georgian ribbon; Russian: Георгиевская лента, romanized: Georgiyevskaya lenta; and the Guards ribbon in Soviet context) [a] is a Russian military symbol consisting of a black and orange bicolour pattern, with three black and two orange stripes.
A 175-watt mercury-vapor light approximately 15 seconds after starting. A closeup of a 175-W mercury-vapor lamp. The small diagonal cylinder at the bottom of the arc tube is a resistor which supplies current to the starter electrode. A mercury-vapor lamp is a gas-discharge lamp that uses an electric arc through vaporized mercury to produce ...
[1] [2] Franck and Hertz had designed a vacuum tube for studying energetic electrons that flew through a thin vapor of mercury atoms. They discovered that, when an electron collided with a mercury atom, it could lose only a specific quantity (4.9 electron volts ) of its kinetic energy before flying away. [ 3 ]
The United States Armed Forces authorize certain medal and ribbon devices that may be worn if authorized on a defined set of United States military decorations and awards. [1] The devices vary between 3 ⁄ 16 inch to 13 ⁄ 32 inch in size and are usually attached to suspension and service ribbons of medals and to unit award ribbons. The ...
A candle pushed into the centre of the orange, then lit, representing Jesus Christ as Light of the World; A red ribbon wrapped around the orange or a paper frill around the candle, representing the blood of Christ; Dried fruits and/or sweets skewered on cocktail sticks pushed into the orange, representing the fruits of the earth and the four ...
The introduction of the metal vapor lamp, including various metals within the discharge tube, was a later advance. The heat of the gas discharge vaporizes some of the metal and the discharge is then produced almost exclusively by the metal vapor. The usual metals are sodium and mercury owing to their visible spectrum emission.
The metals and common colours of heraldry. One system of hatching is shown at right. Tinctures are the colours, metals, and furs used in heraldry.Nine tinctures are in common use: two metals, or (gold or yellow) and argent (silver or white); the colours gules (red), azure (blue), vert (green), sable (black), and purpure (purple); and the furs ermine, which represents the winter fur of a stoat ...
Peter Cooper Hewitt (May 5, 1861 – August 25, 1921) was an American electrical engineer and inventor, who invented the first mercury-vapor lamp in 1901. [1] Hewitt was issued U.S. patent 682,692 on September 17, 1901. [2] In 1903, Hewitt created an improved version that possessed higher color qualities which eventually found widespread ...