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  2. Sodium-vapor lamp - Wikipedia

    en.wikipedia.org/wiki/Sodium-vapor_lamp

    A high-pressure sodium street light in Toronto A high-pressure sodium-vapor lamp An HPS lamp that isn't entirely off. A sodium-vapor lamp is a gas-discharge lamp that uses sodium in an excited state to produce light at a characteristic wavelength near 589 nm. Two varieties of such lamps exist: low pressure, and high pressure.

  3. Gas lighting - Wikipedia

    en.wikipedia.org/wiki/Gas_lighting

    Gas lighting in the historical center of Wrocław, Poland, is manually turned off and on daily.. Gas lighting is the production of artificial light from combustion of a fuel gas such as methane, propane, butane, acetylene, ethylene, hydrogen, carbon monoxide, coal gas (town gas) or natural gas.

  4. Gas-discharge lamp - Wikipedia

    en.wikipedia.org/wiki/Gas-discharge_lamp

    A flicker light bulb, flicker flame light bulb or flicker glow lamp is a gas-discharge lamp which produces light by ionizing a gas, usually neon mixed with helium and a small amount of nitrogen gas, by an electric current passing through two flame shaped electrode screens coated with partially decomposed barium azide. The ionized gas moves ...

  5. Gas-filled tube - Wikipedia

    en.wikipedia.org/wiki/Gas-filled_tube

    A gas-discharge lamp is an electric light using a gas-filled tube; these include fluorescent lamps, metal-halide lamps, sodium-vapor lamps, and neon lights. Specialized gas-filled tubes such as krytrons , thyratrons , and ignitrons are used as switching devices in electric devices.

  6. Hollow-cathode lamp - Wikipedia

    en.wikipedia.org/wiki/Hollow-cathode_lamp

    An HCL can also be used to tune light sources to a specific atomic transition by making use of the optogalvanic effect, which is a result of direct or indirect photoionization. By shining the light source into the HCL, one can excite or even eject electrons (directly photoionize) from the atoms inside the lamp, so long as the light source ...

  7. Hydrogen chloride - Wikipedia

    en.wikipedia.org/wiki/Hydrogen_chloride

    Cl 2 + H 2 2 HCl. As the reaction is exothermic, the installation is called an HCl oven or HCl burner. The resulting hydrogen chloride gas is absorbed in deionized water, resulting in chemically pure hydrochloric acid. This reaction can give a very pure product, e.g. for use in the food industry. The reaction can also be triggered by blue ...

  8. What should you do if a red light won’t change? Can you run ...

    www.aol.com/red-light-won-t-change-150000738.html

    Running a red light in California can result in a base fine of $100, Sgt. Amar Gandhi, with the Sacramento County Sheriff’s Office, previously told The Bee. After additional fees, the ticket can ...

  9. Hypochlorous acid - Wikipedia

    en.wikipedia.org/wiki/Hypochlorous_acid

    Hypochlorous acid is an inorganic compound with the chemical formula Cl O H, also written as HClO, HOCl, or ClHO. [2] [3] Its structure is H−O−Cl.It is an acid that forms when chlorine dissolves in water, and itself partially dissociates, forming a hypochlorite anion, ClO −.