incandescence

(noun)

Incandescence is the emission of light (visible electromagnetic radiation) from a hot body as a result of its temperature.

Examples of incandescence in the following topics:

  • Energy Usage

    • Fluorescent lights are about four times more efficient than incandescent lights—this is true for both the long tubes and the compact fluorescent lights (CFL).
    • Thus, a 60-W incandescent bulb can be replaced by a 15-W CFL, which has the same brightness and color.
    • CFLs have a bent tube inside a globe or a spiral-shaped tube, all connected to a standard screw-in base that fits standard incandescent light sockets.
    • CFLs are much more efficient than incandescent bulbs and so consume much less energy for the intensity light produces.
  • Problems

    • Figure 12.5 shows shocked air heated to incandescence about two milliseconds after the detonation of a nuclear bomb.
  • The Spectrometer

    • A material is heated to incandescence and it emits a light that is characteristic of its atomic makeup.
  • Infrared Waves

    • Visible light or ultraviolet-emitting lasers can char paper and incandescently hot objects emit visible radiation.
    • Objects at room temperature will emit radiation mostly concentrated in the 8 to 25 µm band, but this is not distinct from the emission of visible light by incandescent objects and ultraviolet by even hotter objects (see sections on black body radiation and Wien's displacement law).
  • The Inventions of the Telephone and Electricity

    • Edison did not invent the first electric light bulb, but rather the first commercially practical incandescent light.
    • Many earlier inventors had previously devised incandescent lamps, including Henry Woodward and Mathew Evans.
    • Others who developed early and commercially impractical incandescent electric lamps included Humphry Davy, James Bowman Lindsay, Moses G.
  • What is Power?

    • For example, a 60-W incandescent bulb converts only 5 W of electrical power to light, with 55 W dissipating into thermal energy.
  • Standard Units (SI Units)

    • Now, with the prevalence of incandescent and fluorescent light sources, the candela is defined as the luminous intensity in a given direction of a source that emits monochromatic radiation of frequency $540 \cdot 10^{12}$ Hertz and that has a radiant intensity in that direction of 1/683 watts per steradian.
  • Properties of Nitrogen

    • In ordinary incandescent light bulbs as an inexpensive alternative to argon
  • The Venetian Painters of the High Renaissance

    • Most of all, it is about the incandescence of light and color.
  • Mechanistic Background

    • Depending on the compounds being studied and the information being sought, bright incandescent lamps (chiefly infrared and visible light), low, medium and high pressure mercury lamps (185 - 255 nm, 255 -1000 nm & 220 -1400 nm respectively), high intensity flash sources and lasers have all been used.
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