Light Bulb

Contest Info

  • Started: 10/15/2007 06:00
  • Ended: 10/19/2007 06:00
  • Level: apprentice
  • Entries: 22
  • Jackpot:
  • FN Apprentice 1st Place $1.5
  • FN Apprentice 2nd Place $0.9
  • FN Apprentice 3rd Place $0.6
Light Bulb
Contest Directions: Photoshop this light bulb image any way you wish. Examples may include changing its shape, merging the light bulb with some other object or animal, including the light bulb in paintings. These are just some ideas.
You have 3 days to submit your entry. Submitting it early will give you plenty of time to read the critique comments and edit your image accordingly.
Many thanks to Lyina for the idea, and to Stock Exchange for providing the source image.

Contest Info

    • Started: 10/15/2007 06:00
    • Ended: 10/19/2007 06:00
    • Level: apprentice
    • Entries: 22
    • Jackpot:
    • FN Apprentice 1st Place $1.5
    • FN Apprentice 2nd Place $0.9
    • FN Apprentice 3rd Place $0.6
This gallery only contains our top 20 selections from its parent contest Light Bulb. All 22 contest pictures can be viewed here.
  • Stuck in a Bad Situation

    Stuck in a Bad Situation
  • Light beer...Literally!

    Light beer...Literally!
  • Lightning Bug with Big Watts

    Lightning Bug with Big Watts
  • drugs

    drugs
  • Supersonic

    Supersonic
  • Scary Night Light

    Scary Night Light
  • A helping hand

    A helping hand
  • Golf

    Golf
  • Let your Light shine Shampoo

    Let your Light shine Shampoo
  • Global Warming

    Global Warming
  • Light

    Light
  • Edison

    Edison
  • Hallucination bulb

    Hallucination bulb
  • Finished Eating

    Finished Eating
  • Thinking For Dummies

    Thinking For Dummies
  • If I had a million light bulbs ...

    If I had a million light bulbs ...
  • A "Lightbulb" moment

    A
  • IDEA

    IDEA
  • Al, after Nobel gets Political for Perz

    Al, after Nobel gets Political for Perz
  • Edison

    Edison
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This contest is fueled by the following news: Incandescent light bulb - it is an illuminating instrument and a source of artificial light. An electrical current passes through a thin filament, heating it until it produces light. Working principle: In the light bulb, heating effect of the filament (glowing filament) takes place during the passage of electrical current through it. Temperature of the tungsten wire suddenly increases after the power is on. The wire emits electromagnetic emissions according to the Planck's rule. Planck's function has a maximum, position of which on the length scale depends on temperature. This maximum slides with the temperature increase in the direction of shorter wave length (Wien's displacement law). To get a visible emission it is necessary that the temperature should be several thousand degrees, in an ideal way 6000 K (Temperature of the surface of the Sun). The lower is the temperature the lower will be the part of visible light and the more it appears as red emission. A part of the consumed electrical energy by the lamp filament modifies into light, part of it goes to thermal conductivity and convection. Only small part of it lies in the visible light field, basic part falls with in the infrared radiation. To increase the coefficient of efficiency of the bulb and to get maximum (white) light it is necessary to increase the temperature of the tungsten wire, which in its turn is bound to the properties of the tungsten wire material - melting temperature. Ideal temperature of 6000 K is unachievable, as during this temperature any material melts, damages and stops current flow. In the modern bulbs for incandescence, materials with maximum melting temperature are used - Tungsten (3410C) and very rarely, Osmium (3045C). At practically achievable temperatures like 2300-2900C illumination is far from the white light and not the day light. Due to this reason incandescent bulb releases light, which appears to be "yellow-red" in color, than the day light. For the characteristics of the quality of light so called color temperature is used. In common air at such temperatures tungsten would have immediately turned into oxide. Because of this tungsten wire is protected in a glass bulb, filled with inert gases (commonly Argon). First bulbs were made with vacuum flasks. However in vacuum under high temperatures tungsten evaporates quickly, making wire thinner and darkening glass flask as precipitates on it. Later bulbs are being filled with chemical inert gases. At present vacuum flasks are used for bulbs of lower energy.
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